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 acm->putbuffer = NULL; 748 err = usb_autopm_get_interface_async(acm->control); 749 spin_lock_irqsave(&acm->write_lock, flags); 750 if (err < 0) { 751 cur->use = 0; 752 goto out; 753 } 754 755 if (acm->susp_count) 756 usb_anchor_urb(cur->urb, &acm->delayed); 757 else 758 acm_start_wb(acm, cur); 759 out: 760 spin_unlock_irqrestore(&acm->write_lock, flags); 761 return; 762 } 763 764 static int acm_tty_put_char(struct tty_struct *tty, unsigned char ch) 765 { 766 struct acm *acm = tty->driver_data; 767 struct acm_wb *cur; 768 int wbn; 769 unsigned long flags; 770 771 overflow: 772 cur = acm->putbuffer; 773 if (!cur) { 774 spin_lock_irqsave(&acm->write_lock, flags); 775 wbn = acm_wb_alloc(acm); 776 if (wbn >= 0) { 777 cur = &acm->wb[wbn]; 778 acm->putbuffer = cur; 779 } 780 spin_unlock_irqrestore(&acm->write_lock, flags); 781 if (!cur) 782 return 0; 783 } 784 785 if (cur->len == acm->writesize) { 786 acm_tty_flush_chars(tty); 787 goto overflow; 788 } 789 790 cur->buf[cur->len++] = ch; 791 return 1; 792 } 793 794 static int acm_tty_write_room(struct tty_struct *tty) 795 { 796 struct acm *acm = tty->driver_data; 797 /* 798 * Do not let the line discipline to know that we have a reserve, 799 * or it might get too enthusiastic. 800 */ 801 return acm_wb_is_avail(acm) ? acm->writesize : 0; 802 } 803 804 static int acm_tty_chars_in_buffer(struct tty_struct *tty) 805 { 806 struct acm *acm = tty->driver_data; 807 /* 808 * if the device was unplugged then any remaining characters fell out 809 * of the connector ;) 810 */ 811 if (acm->disconnected) 812 return 0; 813 /* 814 * This is inaccurate (overcounts), but it works. 815 */ 816 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize; 817 } 818 819 static void acm_tty_throttle(struct tty_struct *tty) 820 { 821 struct acm *acm = tty->driver_data; 822 823 spin_lock_irq(&acm->read_lock); 824 acm->throttle_req = 1; 825 spin_unlock_irq(&acm->read_lock); 826 } 827 828 static void acm_tty_unthrottle(struct tty_struct *tty) 829 { 830 struct acm *acm = tty->driver_data; 831 unsigned int was_throttled; 832 833 spin_lock_irq(&acm->read_lock); 834 was_throttled = acm->throttled; 835 acm->throttled = 0; 836 acm->throttle_req = 0; 837 spin_unlock_irq(&acm->read_lock); 838 839 if (was_throttled) 840 acm_submit_read_urbs(acm, GFP_KERNEL); 841 } 842 843 static int acm_tty_break_ctl(struct tty_struct *tty, int state) 844 { 845 struct acm *acm = tty->driver_data; 846 int retval; 847 848 retval = acm_send_break(acm, state ? 0xffff : 0); 849 if (retval < 0) 850 dev_dbg(&acm->control->dev, "%s - send break failed\n", 851 __func__); 852 return retval; 853 } 854 855 static int acm_tty_tiocmget(struct tty_struct *tty) 856 { 857 struct acm *acm = tty->driver_data; 858 859 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) | 860 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) | 861 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) | 862 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) | 863 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) | 864 TIOCM_CTS; 865 } 866 867 static int acm_tty_tiocmset(struct tty_struct *tty, 868 unsigned int set, unsigned int clear) 869 { 870 struct acm *acm = tty->driver_data; 871 unsigned int newctrl; 872 873 newctrl = acm->ctrlout; 874 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 875 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0); 876 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 877 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0); 878 879 newctrl = (newctrl & ~clear) | set; 880 881 if (acm->ctrlout == newctrl) 882 return 0; 883 return acm_set_control(acm, acm->ctrlout = newctrl); 884 } 885 886 static int get_serial_info(struct acm *acm, struct serial_struct __user *info) 887 { 888 struct serial_struct tmp; 889 890 if (!info) 891 return -EINVAL; 892 893 memset(&tmp, 0, sizeof(tmp)); 894 tmp.flags = ASYNC_LOW_LATENCY; 895 tmp.xmit_fifo_size = acm->writesize; 896 tmp.baud_base = le32_to_cpu(acm->line.dwDTERate); 897 tmp.close_delay = acm->port.close_delay / 10; 898 tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 899 ASYNC_CLOSING_WAIT_NONE : 900 acm->port.closing_wait / 10; 901 902 if (copy_to_user(info, &tmp, sizeof(tmp))) 903 return -EFAULT; 904 else 905 return 0; 906 } 907 908 static int set_serial_info(struct acm *acm, 909 struct serial_struct __user *newinfo) 910 { 911 struct serial_struct new_serial; 912 unsigned int closing_wait, close_delay; 913 int retval = 0; 914 915 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial))) 916 return -EFAULT; 917 918 close_delay = new_serial.close_delay * 10; 919 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 920 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10; 921 922 mutex_lock(&acm->port.mutex); 923 924 if (!capable(CAP_SYS_ADMIN)) { 925 if ((close_delay != acm->port.close_delay) || 926 (closing_wait != acm->port.closing_wait)) 927 retval = -EPERM; 928 else 929 retval = -EOPNOTSUPP; 930 } else { 931 acm->port.close_delay = close_delay; 932 acm->port.closing_wait = closing_wait; 933 } 934 935 mutex_unlock(&acm->port.mutex); 936 return retval; 937 } 938 939 static int wait_serial_change(struct acm *acm, unsigned long arg) 940 { 941 int rv = 0; 942 DECLARE_WAITQUEUE(wait, current); 943 struct async_icount old, new; 944 945 if (arg & (TIOCM_DSR | TIOCM_RI | TIOCM_CD )) 946 return -EINVAL; 947 do { 948 spin_lock_irq(&acm->read_lock); 949 old = acm->oldcount; 950 new = acm->iocount; 951 acm->oldcount = new; 952 spin_unlock_irq(&acm->read_lock); 953 954 if ((arg & TIOCM_DSR) && 955 old.dsr != new.dsr) 956 break; 957 if ((arg & TIOCM_CD) && 958 old.dcd != new.dcd) 959 break; 960 if ((arg & TIOCM_RI) && 961 old.rng != new.rng) 962 break; 963 964 add_wait_queue(&acm->wioctl, &wait); 965 set_current_state(TASK_INTERRUPTIBLE); 966 schedule(); 967 remove_wait_queue(&acm->wioctl, &wait); 968 if (acm->disconnected) { 969 if (arg & TIOCM_CD) 970 break; 971 else 972 rv = -ENODEV; 973 } else { 974 if (signal_pending(current)) 975 rv = -ERESTARTSYS; 976 } 977 } while (!rv); 978 979 980 981 return rv; 982 } 983 984 static int get_serial_usage(struct acm *acm, 985 struct serial_icounter_struct __user *count) 986 { 987 struct serial_icounter_struct icount; 988 int rv = 0; 989 990 memset(&icount, 0, sizeof(icount)); 991 icount.dsr = acm->iocount.dsr; 992 icount.rng = acm->iocount.rng; 993 icount.dcd = acm->iocount.dcd; 994 icount.frame = acm->iocount.frame; 995 icount.overrun = acm->iocount.overrun; 996 icount.parity = acm->iocount.parity; 997 icount.brk = acm->iocount.brk; 998 999 if (copy_to_user(count, &icount, sizeof(icount)) > 0) 1000 rv = -EFAULT; 1001 1002 return rv; 1003 } 1004 1005 static int acm_tty_ioctl(struct tty_struct *tty, 1006 unsigned int cmd, unsigned long arg) 1007 { 1008 struct acm *acm = tty->driver_data; 1009 int rv = -ENOIOCTLCMD; 1010 1011 switch (cmd) { 1012 case TIOCGSERIAL: /* gets serial port data */ 1013 rv = get_serial_info(acm, (struct serial_struct __user *) arg); 1014 break; 1015 case TIOCSSERIAL: 1016 rv = set_serial_info(acm, (struct serial_struct __user *) arg); 1017 break; 1018 case TIOCMIWAIT: 1019 rv = usb_autopm_get_interface(acm->control); 1020 if (rv < 0) { 1021 rv = -EIO; 1022 break; 1023 } 1024 rv = wait_serial_change(acm, arg); 1025 usb_autopm_put_interface(acm->control); 1026 break; 1027 case TIOCGICOUNT: 1028 rv = get_serial_usage(acm, (struct serial_icounter_struct __user *) arg); 1029 break; 1030 } 1031 1032 return rv; 1033 } 1034 1035 static void acm_tty_set_termios(struct tty_struct *tty, 1036 struct ktermios *termios_old) 1037 { 1038 struct acm *acm = tty->driver_data; 1039 struct ktermios *termios = &tty->termios; 1040 struct usb_cdc_line_coding newline; 1041 int newctrl = acm->ctrlout; 1042 1043 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty)); 1044 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; 1045 newline.bParityType = termios->c_cflag & PARENB ? 1046 (termios->c_cflag & PARODD ? 1 : 2) + 1047 (termios->c_cflag & CMSPAR ? 2 : 0) : 0; 1048 switch (termios->c_cflag & CSIZE) { 1049 case CS5: 1050 newline.bDataBits = 5; 1051 break; 1052 case CS6: 1053 newline.bDataBits = 6; 1054 break; 1055 case CS7: 1056 newline.bDataBits = 7; 1057 break; 1058 case CS8: 1059 default: 1060 newline.bDataBits = 8; 1061 break; 1062 } 1063 /* FIXME: Needs to clear unsupported bits in the termios */ 1064 acm->clocal = ((termios->c_cflag & CLOCAL) != 0); 1065 1066 if (C_BAUD(tty) == B0) { 1067 newline.dwDTERate = acm->line.dwDTERate; 1068 newctrl &= ~ACM_CTRL_DTR; 1069 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) { 1070 newctrl |= ACM_CTRL_DTR; 1071 } 1072 1073 if (newctrl != acm->ctrlout) 1074 acm_set_control(acm, acm->ctrlout = newctrl); 1075 1076 if (memcmp(&acm->line, &newline, sizeof newline)) { 1077 memcpy(&acm->line, &newline, sizeof newline); 1078 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n", 1079 __func__, 1080 le32_to_cpu(newline.dwDTERate), 1081 newline.bCharFormat, newline.bParityType, 1082 newline.bDataBits); 1083 acm_set_line(acm, &acm->line); 1084 } 1085 } 1086 1087 static const struct tty_port_operations acm_port_ops = { 1088 .dtr_rts = acm_port_dtr_rts, 1089 .shutdown = acm_port_shutdown, 1090 .activate = acm_port_activate, 1091 .destruct = acm_port_destruct, 1092 }; 1093 1094 /* 1095 * USB probe and disconnect routines. 1096 */ 1097 1098 /* Little helpers: write/read buffers free */ 1099 static void acm_write_buffers_free(struct acm *acm) 1100 { 1101 int i; 1102 struct acm_wb *wb; 1103 struct usb_device *usb_dev = interface_to_usbdev(acm->control); 1104 1105 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) 1106 usb_free_coherent(usb_dev, acm->writesize, wb->buf, wb->dmah); 1107 } 1108 1109 static void acm_read_buffers_free(struct acm *acm) 1110 { 1111 struct usb_device *usb_dev = interface_to_usbdev(acm->control); 1112 int i; 1113 1114 for (i = 0; i < acm->rx_buflimit; i++) 1115 usb_free_coherent(usb_dev, acm->readsize, 1116 acm->read_buffers[i].base, acm->read_buffers[i].dma); 1117 } 1118 1119 /* Little helper: write buffers allocate */ 1120 static int acm_write_buffers_alloc(struct acm *acm) 1121 { 1122 int i; 1123 struct acm_wb *wb; 1124 1125 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { 1126 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL, 1127 &wb->dmah); 1128 if (!wb->buf) { 1129 while (i != 0) { 1130 --i; 1131 --wb; 1132 usb_free_coherent(acm->dev, acm->writesize, 1133 wb->buf, wb->dmah); 1134 } 1135 return -ENOMEM; 1136 } 1137 } 1138 return 0; 1139 } 1140 1141 static int acm_probe(struct usb_interface *intf, 1142 const struct usb_device_id *id) 1143 { 1144 struct usb_cdc_union_desc *union_header = NULL; 1145 struct usb_cdc_country_functional_desc *cfd = NULL; 1146 unsigned char *buffer = intf->altsetting->extra; 1147 int buflen = intf->altsetting->extralen; 1148 struct usb_interface *control_interface; 1149 struct usb_interface *data_interface; 1150 struct usb_endpoint_descriptor *epctrl = NULL; 1151 struct usb_endpoint_descriptor *epread = NULL; 1152 struct usb_endpoint_descriptor *epwrite = NULL; 1153 struct usb_device *usb_dev = interface_to_usbdev(intf); 1154 struct acm *acm; 1155 int minor; 1156 int ctrlsize, readsize; 1157 u8 *buf; 1158 u8 ac_management_function = 0; 1159 u8 call_management_function = 0; 1160 int call_interface_num = -1; 1161 int data_interface_num = -1; 1162 unsigned long quirks; 1163 int num_rx_buf; 1164 int i; 1165 unsigned int elength = 0; 1166 int combined_interfaces = 0; 1167 struct device *tty_dev; 1168 int rv = -ENOMEM; 1169 1170 /* normal quirks */ 1171 quirks = (unsigned long)id->driver_info; 1172 1173 if (quirks == IGNORE_DEVICE) 1174 return -ENODEV; 1175 1176 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR; 1177 1178 /* handle quirks deadly to normal probing*/ 1179 if (quirks == NO_UNION_NORMAL) { 1180 data_interface = usb_ifnum_to_if(usb_dev, 1); 1181 control_interface = usb_ifnum_to_if(usb_dev, 0); 1182 goto skip_normal_probe; 1183 } 1184 1185 /* normal probing*/ 1186 if (!buffer) { 1187 dev_err(&intf->dev, "Weird descriptor references\n"); 1188 return -EINVAL; 1189 } 1190 1191 if (!buflen) { 1192 if (intf->cur_altsetting->endpoint && 1193 intf->cur_altsetting->endpoint->extralen && 1194 intf->cur_altsetting->endpoint->extra) { 1195 dev_dbg(&intf->dev, 1196 "Seeking extra descriptors on endpoint\n"); 1197 buflen = intf->cur_altsetting->endpoint->extralen; 1198 buffer = intf->cur_altsetting->endpoint->extra; 1199 } else { 1200 dev_err(&intf->dev, 1201 "Zero length descriptor references\n"); 1202 return -EINVAL; 1203 } 1204 } 1205 1206 while (buflen > 0) { 1207 elength = buffer[0]; 1208 if (!elength) { 1209 dev_err(&intf->dev, "skipping garbage byte\n"); 1210 elength = 1; 1211 goto next_desc; 1212 } 1213 if (buffer[1] != USB_DT_CS_INTERFACE) { 1214 dev_err(&intf->dev, "skipping garbage\n"); 1215 goto next_desc; 1216 } 1217 1218 switch (buffer[2]) { 1219 case USB_CDC_UNION_TYPE: /* we've found it */ 1220 if (elength < sizeof(struct usb_cdc_union_desc)) 1221 goto next_desc; 1222 if (union_header) { 1223 dev_err(&intf->dev, "More than one " 1224 "union descriptor, skipping ...\n"); 1225 goto next_desc; 1226 } 1227 union_header = (struct usb_cdc_union_desc *)buffer; 1228 break; 1229 case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/ 1230 if (elength < sizeof(struct usb_cdc_country_functional_desc)) 1231 goto next_desc; 1232 cfd = (struct usb_cdc_country_functional_desc *)buffer; 1233 break; 1234 case USB_CDC_HEADER_TYPE: /* maybe check version */ 1235 break; /* for now we ignore it */ 1236 case USB_CDC_ACM_TYPE: 1237 if (elength < 4) 1238 goto next_desc; 1239 ac_management_function = buffer[3]; 1240 break; 1241 case USB_CDC_CALL_MANAGEMENT_TYPE: 1242 if (elength < 5) 1243 goto next_desc; 1244 call_management_function = buffer[3]; 1245 call_interface_num = buffer[4]; 1246 break; 1247 default: 1248 /* 1249 * there are LOTS more CDC descriptors that 1250 * could legitimately be found here. 1251 */ 1252 dev_dbg(&intf->dev, "Ignoring descriptor: " 1253 "type %02x, length %ud\n", 1254 buffer[2], elength); 1255 break; 1256 } 1257 next_desc: 1258 buflen -= elength; 1259 buffer += elength; 1260 } 1261 1262 if (!union_header) { 1263 if (call_interface_num > 0) { 1264 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n"); 1265 /* quirks for Droids MuIn LCD */ 1266 if (quirks & NO_DATA_INTERFACE) 1267 data_interface = usb_ifnum_to_if(usb_dev, 0); 1268 else 1269 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num)); 1270 control_interface = intf; 1271 } else { 1272 if (intf->cur_altsetting->desc.bNumEndpoints != 3) { 1273 dev_dbg(&intf->dev,"No union descriptor, giving up\n"); 1274 return -ENODEV; 1275 } else { 1276 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n"); 1277 combined_interfaces = 1; 1278 control_interface = data_interface = intf; 1279 goto look_for_collapsed_interface; 1280 } 1281 } 1282 } else { 1283 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); 1284 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0)); 1285 } 1286 1287 if (!control_interface || !data_interface) { 1288 dev_dbg(&intf->dev, "no interfaces\n"); 1289 return -ENODEV; 1290 } 1291 1292 if (data_interface_num != call_interface_num) 1293 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n"); 1294 1295 if (control_interface == data_interface) { 1296 /* some broken devices designed for windows work this way */ 1297 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n"); 1298 combined_interfaces = 1; 1299 /* a popular other OS doesn't use it */ 1300 quirks |= NO_CAP_LINE; 1301 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) { 1302 dev_err(&intf->dev, "This needs exactly 3 endpoints\n"); 1303 return -EINVAL; 1304 } 1305 look_for_collapsed_interface: 1306 for (i = 0; i < 3; i++) { 1307 struct usb_endpoint_descriptor *ep; 1308 ep = &data_interface->cur_altsetting->endpoint[i].desc; 1309 1310 if (usb_endpoint_is_int_in(ep)) 1311 epctrl = ep; 1312 else if (usb_endpoint_is_bulk_out(ep)) 1313 epwrite = ep; 1314 else if (usb_endpoint_is_bulk_in(ep)) 1315 epread = ep; 1316 else 1317 return -EINVAL; 1318 } 1319 if (!epctrl || !epread || !epwrite) 1320 return -ENODEV; 1321 else 1322 goto made_compressed_probe; 1323 } 1324 1325 skip_normal_probe: 1326 1327 /*workaround for switched interfaces */ 1328 if (data_interface->cur_altsetting->desc.bInterfaceClass 1329 != CDC_DATA_INTERFACE_TYPE) { 1330 if (control_interface->cur_altsetting->desc.bInterfaceClass 1331 == CDC_DATA_INTERFACE_TYPE) { 1332 dev_dbg(&intf->dev, 1333 "Your device has switched interfaces.\n"); 1334 swap(control_interface, data_interface); 1335 } else { 1336 return -EINVAL; 1337 } 1338 } 1339 1340 /* Accept probe requests only for the control interface */ 1341 if (!combined_interfaces && intf != control_interface) 1342 return -ENODEV; 1343 1344 if (!combined_interfaces && usb_interface_claimed(data_interface)) { 1345 /* valid in this context */ 1346 dev_dbg(&intf->dev, "The data interface isn't available\n"); 1347 return -EBUSY; 1348 } 1349 1350 1351 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 || 1352 control_interface->cur_altsetting->desc.bNumEndpoints == 0) 1353 return -EINVAL; 1354 1355 epctrl = &control_interface->cur_altsetting->endpoint[0].desc; 1356 epread = &data_interface->cur_altsetting->endpoint[0].desc; 1357 epwrite = &data_interface->cur_altsetting->endpoint[1].desc; 1358 1359 1360 /* workaround for switched endpoints */ 1361 if (!usb_endpoint_dir_in(epread)) { 1362 /* descriptors are swapped */ 1363 dev_dbg(&intf->dev, 1364 "The data interface has switched endpoints\n"); 1365 swap(epread, epwrite); 1366 } 1367 made_compressed_probe: 1368 dev_dbg(&intf->dev, "interfaces are valid\n"); 1369 1370 acm = kzalloc(sizeof(struct acm), GFP_KERNEL); 1371 if (acm == NULL) 1372 goto alloc_fail; 1373 1374 minor = acm_alloc_minor(acm); 1375 if (minor < 0) { 1376 dev_err(&intf->dev, "no more free acm devices\n"); 1377 kfree(acm); 1378 return -ENODEV; 1379 } 1380 1381 ctrlsize = usb_endpoint_maxp(epctrl); 1382 readsize = usb_endpoint_maxp(epread) * 1383 (quirks == SINGLE_RX_URB ? 1 : 2); 1384 acm->combined_interfaces = combined_interfaces; 1385 acm->writesize = usb_endpoint_maxp(epwrite) * 20; 1386 acm->control = control_interface; 1387 acm->data = data_interface; 1388 acm->minor = minor; 1389 acm->dev = usb_dev; 1390 acm->ctrl_caps = ac_management_function; 1391 if (quirks & NO_CAP_LINE) 1392 acm->ctrl_caps &= ~USB_CDC_CAP_LINE; 1393 acm->ctrlsize = ctrlsize; 1394 acm->readsize = readsize; 1395 acm->rx_buflimit = num_rx_buf; 1396 INIT_WORK(&acm->work, acm_softint); 1397 init_waitqueue_head(&acm->wioctl); 1398 spin_lock_init(&acm->write_lock); 1399 spin_lock_init(&acm->read_lock); 1400 mutex_init(&acm->mutex); 1401 acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); 1402 acm->is_int_ep = usb_endpoint_xfer_int(epread); 1403 if (acm->is_int_ep) 1404 acm->bInterval = epread->bInterval; 1405 tty_port_init(&acm->port); 1406 acm->port.ops = &acm_port_ops; 1407 init_usb_anchor(&acm->delayed); 1408 acm->quirks = quirks; 1409 1410 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); 1411 if (!buf) 1412 goto alloc_fail2; 1413 acm->ctrl_buffer = buf; 1414 1415 if (acm_write_buffers_alloc(acm) < 0) 1416 goto alloc_fail4; 1417 1418 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); 1419 if (!acm->ctrlurb) 1420 goto alloc_fail5; 1421 1422 for (i = 0; i < num_rx_buf; i++) { 1423 struct acm_rb *rb = &(acm->read_buffers[i]); 1424 struct urb *urb; 1425 1426 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL, 1427 &rb->dma); 1428 if (!rb->base) 1429 goto alloc_fail6; 1430 rb->index = i; 1431 rb->instance = acm; 1432 1433 urb = usb_alloc_urb(0, GFP_KERNEL); 1434 if (!urb) 1435 goto alloc_fail6; 1436 1437 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1438 urb->transfer_dma = rb->dma; 1439 if (acm->is_int_ep) { 1440 usb_fill_int_urb(urb, acm->dev, 1441 acm->rx_endpoint, 1442 rb->base, 1443 acm->readsize, 1444 acm_read_bulk_callback, rb, 1445 acm->bInterval); 1446 } else { 1447 usb_fill_bulk_urb(urb, acm->dev, 1448 acm->rx_endpoint, 1449 rb->base, 1450 acm->readsize, 1451 acm_read_bulk_callback, rb); 1452 } 1453 1454 acm->read_urbs[i] = urb; 1455 __set_bit(i, &acm->read_urbs_free); 1456 } 1457 for (i = 0; i < ACM_NW; i++) { 1458 struct acm_wb *snd = &(acm->wb[i]); 1459 1460 snd->urb = usb_alloc_urb(0, GFP_KERNEL); 1461 if (snd->urb == NULL) 1462 goto alloc_fail7; 1463 1464 if (usb_endpoint_xfer_int(epwrite)) 1465 usb_fill_int_urb(snd->urb, usb_dev, 1466 usb_sndintpipe(usb_dev, epwrite->bEndpointAddress), 1467 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval); 1468 else 1469 usb_fill_bulk_urb(snd->urb, usb_dev, 1470 usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress), 1471 NULL, acm->writesize, acm_write_bulk, snd); 1472 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1473 if (quirks & SEND_ZERO_PACKET) 1474 snd->urb->transfer_flags |= URB_ZERO_PACKET; 1475 snd->instance = acm; 1476 } 1477 1478 usb_set_intfdata(intf, acm); 1479 1480 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities); 1481 if (i < 0) 1482 goto alloc_fail7; 1483 1484 if (cfd) { /* export the country data */ 1485 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL); 1486 if (!acm->country_codes) 1487 goto skip_countries; 1488 acm->country_code_size = cfd->bLength - 4; 1489 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0, 1490 cfd->bLength - 4); 1491 acm->country_rel_date = cfd->iCountryCodeRelDate; 1492 1493 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes); 1494 if (i < 0) { 1495 kfree(acm->country_codes); 1496 acm->country_codes = NULL; 1497 acm->country_code_size = 0; 1498 goto skip_countries; 1499 } 1500 1501 i = device_create_file(&intf->dev, 1502 &dev_attr_iCountryCodeRelDate); 1503 if (i < 0) { 1504 device_remove_file(&intf->dev, &dev_attr_wCountryCodes); 1505 kfree(acm->country_codes); 1506 acm->country_codes = NULL; 1507 acm->country_code_size = 0; 1508 goto skip_countries; 1509 } 1510 } 1511 1512 skip_countries: 1513 usb_fill_int_urb(acm->ctrlurb, usb_dev, 1514 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), 1515 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, 1516 /* works around buggy devices */ 1517 epctrl->bInterval ? epctrl->bInterval : 16); 1518 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1519 acm->ctrlurb->transfer_dma = acm->ctrl_dma; 1520 1521 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); 1522 1523 acm->line.dwDTERate = cpu_to_le32(9600); 1524 acm->line.bDataBits = 8; 1525 acm_set_line(acm, &acm->line); 1526 1527 usb_driver_claim_interface(&acm_driver, data_interface, acm); 1528 usb_set_intfdata(data_interface, acm); 1529 1530 usb_get_intf(control_interface); 1531 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor, 1532 &control_interface->dev); 1533 if (IS_ERR(tty_dev)) { 1534 rv = PTR_ERR(tty_dev); 1535 goto alloc_fail8; 1536 } 1537 1538 if (quirks & CLEAR_HALT_CONDITIONS) { 1539 usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress)); 1540 usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress)); 1541 } 1542 1543 return 0; 1544 alloc_fail8: 1545 if (acm->country_codes) { 1546 device_remove_file(&acm->control->dev, 1547 &dev_attr_wCountryCodes); 1548 device_remove_file(&acm->control->dev, 1549 &dev_attr_iCountryCodeRelDate); 1550 kfree(acm->country_codes); 1551 } 1552 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1553 alloc_fail7: 1554 usb_set_intfdata(intf, NULL); 1555 for (i = 0; i < ACM_NW; i++) 1556 usb_free_urb(acm->wb[i].urb); 1557 alloc_fail6: 1558 for (i = 0; i < num_rx_buf; i++) 1559 usb_free_urb(acm->read_urbs[i]); 1560 acm_read_buffers_free(acm); 1561 usb_free_urb(acm->ctrlurb); 1562 alloc_fail5: 1563 acm_write_buffers_free(acm); 1564 alloc_fail4: 1565 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1566 alloc_fail2: 1567 acm_release_minor(acm); 1568 kfree(acm); 1569 alloc_fail: 1570 return rv; 1571 } 1572 1573 static void stop_data_traffic(struct acm *acm) 1574 { 1575 int i; 1576 1577 dev_dbg(&acm->control->dev, "%s\n", __func__); 1578 1579 usb_kill_urb(acm->ctrlurb); 1580 for (i = 0; i < ACM_NW; i++) 1581 usb_kill_urb(acm->wb[i].urb); 1582 for (i = 0; i < acm->rx_buflimit; i++) 1583 usb_kill_urb(acm->read_urbs[i]); 1584 1585 cancel_work_sync(&acm->work); 1586 } 1587 1588 static void acm_disconnect(struct usb_interface *intf) 1589 { 1590 struct acm *acm = usb_get_intfdata(intf); 1591 struct usb_device *usb_dev = interface_to_usbdev(intf); 1592 struct tty_struct *tty; 1593 int i; 1594 1595 dev_dbg(&intf->dev, "%s\n", __func__); 1596 1597 /* sibling interface is already cleaning up */ 1598 if (!acm) 1599 return; 1600 1601 mutex_lock(&acm->mutex); 1602 acm->disconnected = true; 1603 if (acm->country_codes) { 1604 device_remove_file(&acm->control->dev, 1605 &dev_attr_wCountryCodes); 1606 device_remove_file(&acm->control->dev, 1607 &dev_attr_iCountryCodeRelDate); 1608 } 1609 wake_up_all(&acm->wioctl); 1610 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1611 usb_set_intfdata(acm->control, NULL); 1612 usb_set_intfdata(acm->data, NULL); 1613 mutex_unlock(&acm->mutex); 1614 1615 tty = tty_port_tty_get(&acm->port); 1616 if (tty) { 1617 tty_vhangup(tty); 1618 tty_kref_put(tty); 1619 } 1620 1621 stop_data_traffic(acm); 1622 1623 tty_unregister_device(acm_tty_driver, acm->minor); 1624 1625 usb_free_urb(acm->ctrlurb); 1626 for (i = 0; i < ACM_NW; i++) 1627 usb_free_urb(acm->wb[i].urb); 1628 for (i = 0; i < acm->rx_buflimit; i++) 1629 usb_free_urb(acm->read_urbs[i]); 1630 acm_write_buffers_free(acm); 1631 usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1632 acm_read_buffers_free(acm); 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 stop_data_traffic(acm); 1661 1662 return 0; 1663 } 1664 1665 static int acm_resume(struct usb_interface *intf) 1666 { 1667 struct acm *acm = usb_get_intfdata(intf); 1668 struct urb *urb; 1669 int rv = 0; 1670 1671 spin_lock_irq(&acm->write_lock); 1672 1673 if (--acm->susp_count) 1674 goto out; 1675 1676 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) { 1677 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC); 1678 1679 for (;;) { 1680 urb = usb_get_from_anchor(&acm->delayed); 1681 if (!urb) 1682 break; 1683 1684 acm_start_wb(acm, urb->context); 1685 } 1686 1687 /* 1688 * delayed error checking because we must 1689 * do the write path at all cost 1690 */ 1691 if (rv < 0) 1692 goto out; 1693 1694 rv = acm_submit_read_urbs(acm, GFP_ATOMIC); 1695 } 1696 out: 1697 spin_unlock_irq(&acm->write_lock); 1698 1699 return rv; 1700 } 1701 1702 static int acm_reset_resume(struct usb_interface *intf) 1703 { 1704 struct acm *acm = usb_get_intfdata(intf); 1705 1706 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) 1707 tty_port_tty_hangup(&acm->port, false); 1708 1709 return acm_resume(intf); 1710 } 1711 1712 #endif /* CONFIG_PM */ 1713 1714 #define NOKIA_PCSUITE_ACM_INFO(x) \ 1715 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \ 1716 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1717 USB_CDC_ACM_PROTO_VENDOR) 1718 1719 #define SAMSUNG_PCSUITE_ACM_INFO(x) \ 1720 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \ 1721 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1722 USB_CDC_ACM_PROTO_VENDOR) 1723 1724 /* 1725 * USB driver structure. 1726 */ 1727 1728 static const struct usb_device_id acm_ids[] = { 1729 /* quirky and broken devices */ 1730 { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */ 1731 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1732 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */ 1733 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1734 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */ 1735 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1736 }, 1737 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */ 1738 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1739 }, 1740 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */ 1741 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1742 }, 1743 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */ 1744 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1745 }, 1746 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */ 1747 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1748 }, 1749 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */ 1750 .driver_info = SINGLE_RX_URB, 1751 }, 1752 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */ 1753 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1754 }, 1755 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */ 1756 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1757 }, 1758 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */ 1759 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1760 }, 1761 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */ 1762 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1763 }, 1764 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */ 1765 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1766 }, 1767 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */ 1768 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1769 }, 1770 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */ 1771 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1772 }, 1773 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */ 1774 .driver_info = QUIRK_CONTROL_LINE_STATE, }, 1775 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */ 1776 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */ 1777 }, 1778 /* Motorola H24 HSPA module: */ 1779 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */ 1780 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */ 1781 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1782 }, 1783 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */ 1784 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1785 }, 1786 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */ 1787 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1788 }, 1789 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */ 1790 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1791 }, 1792 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */ 1793 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1794 }, 1795 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */ 1796 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1797 }, 1798 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */ 1799 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1800 }, 1801 1802 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */ 1803 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on 1804 data interface instead of 1805 communications interface. 1806 Maybe we should define a new 1807 quirk for this. */ 1808 }, 1809 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */ 1810 .driver_info = NO_UNION_NORMAL, 1811 }, 1812 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */ 1813 .driver_info = NO_UNION_NORMAL, 1814 }, 1815 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */ 1816 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1817 }, 1818 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */ 1819 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1820 }, 1821 1822 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */ 1823 .driver_info = CLEAR_HALT_CONDITIONS, 1824 }, 1825 1826 /* Nokia S60 phones expose two ACM channels. The first is 1827 * a modem and is picked up by the standard AT-command 1828 * information below. The second is 'vendor-specific' but 1829 * is treated as a serial device at the S60 end, so we want 1830 * to expose it on Linux too. */ 1831 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */ 1832 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */ 1833 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */ 1834 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */ 1835 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */ 1836 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */ 1837 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */ 1838 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */ 1839 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */ 1840 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */ 1841 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */ 1842 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */ 1843 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */ 1844 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */ 1845 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */ 1846 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */ 1847 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */ 1848 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */ 1849 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */ 1850 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */ 1851 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */ 1852 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */ 1853 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */ 1854 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */ 1855 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */ 1856 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */ 1857 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */ 1858 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */ 1859 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */ 1860 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */ 1861 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */ 1862 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */ 1863 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1864 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */ 1865 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */ 1866 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */ 1867 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */ 1868 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */ 1869 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */ 1870 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */ 1871 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1872 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */ 1873 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */ 1874 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */ 1875 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */ 1876 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */ 1877 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */ 1878 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */ 1879 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */ 1880 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */ 1881 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */ 1882 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */ 1883 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */ 1884 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */ 1885 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */ 1886 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */ 1887 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */ 1888 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */ 1889 1890 /* Support for Owen devices */ 1891 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */ 1892 1893 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */ 1894 1895 /* Support for Droids MuIn LCD */ 1896 { USB_DEVICE(0x04d8, 0x000b), 1897 .driver_info = NO_DATA_INTERFACE, 1898 }, 1899 1900 #if IS_ENABLED(CONFIG_INPUT_IMS_PCU) 1901 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */ 1902 .driver_info = IGNORE_DEVICE, 1903 }, 1904 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */ 1905 .driver_info = IGNORE_DEVICE, 1906 }, 1907 #endif 1908 1909 /*Samsung phone in firmware update mode */ 1910 { USB_DEVICE(0x04e8, 0x685d), 1911 .driver_info = IGNORE_DEVICE, 1912 }, 1913 1914 /* Exclude Infineon Flash Loader utility */ 1915 { USB_DEVICE(0x058b, 0x0041), 1916 .driver_info = IGNORE_DEVICE, 1917 }, 1918 1919 /* control interfaces without any protocol set */ 1920 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1921 USB_CDC_PROTO_NONE) }, 1922 1923 /* control interfaces with various AT-command sets */ 1924 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1925 USB_CDC_ACM_PROTO_AT_V25TER) }, 1926 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1927 USB_CDC_ACM_PROTO_AT_PCCA101) }, 1928 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1929 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) }, 1930 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1931 USB_CDC_ACM_PROTO_AT_GSM) }, 1932 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1933 USB_CDC_ACM_PROTO_AT_3G) }, 1934 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1935 USB_CDC_ACM_PROTO_AT_CDMA) }, 1936 1937 { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */ 1938 .driver_info = SEND_ZERO_PACKET, 1939 }, 1940 1941 { } 1942 }; 1943 1944 MODULE_DEVICE_TABLE(usb, acm_ids); 1945 1946 static struct usb_driver acm_driver = { 1947 .name = "cdc_acm", 1948 .probe = acm_probe, 1949 .disconnect = acm_disconnect, 1950 #ifdef CONFIG_PM 1951 .suspend = acm_suspend, 1952 .resume = acm_resume, 1953 .reset_resume = acm_reset_resume, 1954 #endif 1955 .id_table = acm_ids, 1956 #ifdef CONFIG_PM 1957 .supports_autosuspend = 1, 1958 #endif 1959 .disable_hub_initiated_lpm = 1, 1960 }; 1961 1962 /* 1963 * TTY driver structures. 1964 */ 1965 1966 static const struct tty_operations acm_ops = { 1967 .install = acm_tty_install, 1968 .open = acm_tty_open, 1969 .close = acm_tty_close, 1970 .cleanup = acm_tty_cleanup, 1971 .hangup = acm_tty_hangup, 1972 .write = acm_tty_write, 1973 .put_char = acm_tty_put_char, 1974 .flush_chars = acm_tty_flush_chars, 1975 .write_room = acm_tty_write_room, 1976 .ioctl = acm_tty_ioctl, 1977 .throttle = acm_tty_throttle, 1978 .unthrottle = acm_tty_unthrottle, 1979 .chars_in_buffer = acm_tty_chars_in_buffer, 1980 .break_ctl = acm_tty_break_ctl, 1981 .set_termios = acm_tty_set_termios, 1982 .tiocmget = acm_tty_tiocmget, 1983 .tiocmset = acm_tty_tiocmset, 1984 }; 1985 1986 /* 1987 * Init / exit. 1988 */ 1989 1990 static int __init acm_init(void) 1991 { 1992 int retval; 1993 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS); 1994 if (!acm_tty_driver) 1995 return -ENOMEM; 1996 acm_tty_driver->driver_name = "acm", 1997 acm_tty_driver->name = "ttyACM", 1998 acm_tty_driver->major = ACM_TTY_MAJOR, 1999 acm_tty_driver->minor_start = 0, 2000 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, 2001 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, 2002 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 2003 acm_tty_driver->init_termios = tty_std_termios; 2004 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | 2005 HUPCL | CLOCAL; 2006 tty_set_operations(acm_tty_driver, &acm_ops); 2007 2008 retval = tty_register_driver(acm_tty_driver); 2009 if (retval) { 2010 put_tty_driver(acm_tty_driver); 2011 return retval; 2012 } 2013 2014 retval = usb_register(&acm_driver); 2015 if (retval) { 2016 tty_unregister_driver(acm_tty_driver); 2017 put_tty_driver(acm_tty_driver); 2018 return retval; 2019 } 2020 2021 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); 2022 2023 return 0; 2024 } 2025 2026 static void __exit acm_exit(void) 2027 { 2028 usb_deregister(&acm_driver); 2029 tty_unregister_driver(acm_tty_driver); 2030 put_tty_driver(acm_tty_driver); 2031 idr_destroy(&acm_minors); 2032 } 2033 2034 module_init(acm_init); 2035 module_exit(acm_exit); 2036 2037 MODULE_AUTHOR(DRIVER_AUTHOR); 2038 MODULE_DESCRIPTION(DRIVER_DESC); 2039 MODULE_LICENSE("GPL"); 2040 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR); 2041