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 /* we would crash */ 1183 if (!data_interface || !control_interface) 1184 return -ENODEV; 1185 goto skip_normal_probe; 1186 } 1187 1188 /* normal probing*/ 1189 if (!buffer) { 1190 dev_err(&intf->dev, "Weird descriptor references\n"); 1191 return -EINVAL; 1192 } 1193 1194 if (!buflen) { 1195 if (intf->cur_altsetting->endpoint && 1196 intf->cur_altsetting->endpoint->extralen && 1197 intf->cur_altsetting->endpoint->extra) { 1198 dev_dbg(&intf->dev, 1199 "Seeking extra descriptors on endpoint\n"); 1200 buflen = intf->cur_altsetting->endpoint->extralen; 1201 buffer = intf->cur_altsetting->endpoint->extra; 1202 } else { 1203 dev_err(&intf->dev, 1204 "Zero length descriptor references\n"); 1205 return -EINVAL; 1206 } 1207 } 1208 1209 while (buflen > 0) { 1210 elength = buffer[0]; 1211 if (!elength) { 1212 dev_err(&intf->dev, "skipping garbage byte\n"); 1213 elength = 1; 1214 goto next_desc; 1215 } 1216 if (buffer[1] != USB_DT_CS_INTERFACE) { 1217 dev_err(&intf->dev, "skipping garbage\n"); 1218 goto next_desc; 1219 } 1220 1221 switch (buffer[2]) { 1222 case USB_CDC_UNION_TYPE: /* we've found it */ 1223 if (elength < sizeof(struct usb_cdc_union_desc)) 1224 goto next_desc; 1225 if (union_header) { 1226 dev_err(&intf->dev, "More than one " 1227 "union descriptor, skipping ...\n"); 1228 goto next_desc; 1229 } 1230 union_header = (struct usb_cdc_union_desc *)buffer; 1231 break; 1232 case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/ 1233 if (elength < sizeof(struct usb_cdc_country_functional_desc)) 1234 goto next_desc; 1235 cfd = (struct usb_cdc_country_functional_desc *)buffer; 1236 break; 1237 case USB_CDC_HEADER_TYPE: /* maybe check version */ 1238 break; /* for now we ignore it */ 1239 case USB_CDC_ACM_TYPE: 1240 if (elength < 4) 1241 goto next_desc; 1242 ac_management_function = buffer[3]; 1243 break; 1244 case USB_CDC_CALL_MANAGEMENT_TYPE: 1245 if (elength < 5) 1246 goto next_desc; 1247 call_management_function = buffer[3]; 1248 call_interface_num = buffer[4]; 1249 break; 1250 default: 1251 /* 1252 * there are LOTS more CDC descriptors that 1253 * could legitimately be found here. 1254 */ 1255 dev_dbg(&intf->dev, "Ignoring descriptor: " 1256 "type %02x, length %ud\n", 1257 buffer[2], elength); 1258 break; 1259 } 1260 next_desc: 1261 buflen -= elength; 1262 buffer += elength; 1263 } 1264 1265 if (!union_header) { 1266 if (call_interface_num > 0) { 1267 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n"); 1268 /* quirks for Droids MuIn LCD */ 1269 if (quirks & NO_DATA_INTERFACE) 1270 data_interface = usb_ifnum_to_if(usb_dev, 0); 1271 else 1272 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num)); 1273 control_interface = intf; 1274 } else { 1275 if (intf->cur_altsetting->desc.bNumEndpoints != 3) { 1276 dev_dbg(&intf->dev,"No union descriptor, giving up\n"); 1277 return -ENODEV; 1278 } else { 1279 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n"); 1280 combined_interfaces = 1; 1281 control_interface = data_interface = intf; 1282 goto look_for_collapsed_interface; 1283 } 1284 } 1285 } else { 1286 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); 1287 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0)); 1288 } 1289 1290 if (!control_interface || !data_interface) { 1291 dev_dbg(&intf->dev, "no interfaces\n"); 1292 return -ENODEV; 1293 } 1294 1295 if (data_interface_num != call_interface_num) 1296 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n"); 1297 1298 if (control_interface == data_interface) { 1299 /* some broken devices designed for windows work this way */ 1300 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n"); 1301 combined_interfaces = 1; 1302 /* a popular other OS doesn't use it */ 1303 quirks |= NO_CAP_LINE; 1304 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) { 1305 dev_err(&intf->dev, "This needs exactly 3 endpoints\n"); 1306 return -EINVAL; 1307 } 1308 look_for_collapsed_interface: 1309 for (i = 0; i < 3; i++) { 1310 struct usb_endpoint_descriptor *ep; 1311 ep = &data_interface->cur_altsetting->endpoint[i].desc; 1312 1313 if (usb_endpoint_is_int_in(ep)) 1314 epctrl = ep; 1315 else if (usb_endpoint_is_bulk_out(ep)) 1316 epwrite = ep; 1317 else if (usb_endpoint_is_bulk_in(ep)) 1318 epread = ep; 1319 else 1320 return -EINVAL; 1321 } 1322 if (!epctrl || !epread || !epwrite) 1323 return -ENODEV; 1324 else 1325 goto made_compressed_probe; 1326 } 1327 1328 skip_normal_probe: 1329 1330 /*workaround for switched interfaces */ 1331 if (data_interface->cur_altsetting->desc.bInterfaceClass 1332 != CDC_DATA_INTERFACE_TYPE) { 1333 if (control_interface->cur_altsetting->desc.bInterfaceClass 1334 == CDC_DATA_INTERFACE_TYPE) { 1335 dev_dbg(&intf->dev, 1336 "Your device has switched interfaces.\n"); 1337 swap(control_interface, data_interface); 1338 } else { 1339 return -EINVAL; 1340 } 1341 } 1342 1343 /* Accept probe requests only for the control interface */ 1344 if (!combined_interfaces && intf != control_interface) 1345 return -ENODEV; 1346 1347 if (!combined_interfaces && usb_interface_claimed(data_interface)) { 1348 /* valid in this context */ 1349 dev_dbg(&intf->dev, "The data interface isn't available\n"); 1350 return -EBUSY; 1351 } 1352 1353 1354 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 || 1355 control_interface->cur_altsetting->desc.bNumEndpoints == 0) 1356 return -EINVAL; 1357 1358 epctrl = &control_interface->cur_altsetting->endpoint[0].desc; 1359 epread = &data_interface->cur_altsetting->endpoint[0].desc; 1360 epwrite = &data_interface->cur_altsetting->endpoint[1].desc; 1361 1362 1363 /* workaround for switched endpoints */ 1364 if (!usb_endpoint_dir_in(epread)) { 1365 /* descriptors are swapped */ 1366 dev_dbg(&intf->dev, 1367 "The data interface has switched endpoints\n"); 1368 swap(epread, epwrite); 1369 } 1370 made_compressed_probe: 1371 dev_dbg(&intf->dev, "interfaces are valid\n"); 1372 1373 acm = kzalloc(sizeof(struct acm), GFP_KERNEL); 1374 if (acm == NULL) 1375 goto alloc_fail; 1376 1377 minor = acm_alloc_minor(acm); 1378 if (minor < 0) { 1379 dev_err(&intf->dev, "no more free acm devices\n"); 1380 kfree(acm); 1381 return -ENODEV; 1382 } 1383 1384 ctrlsize = usb_endpoint_maxp(epctrl); 1385 readsize = usb_endpoint_maxp(epread) * 1386 (quirks == SINGLE_RX_URB ? 1 : 2); 1387 acm->combined_interfaces = combined_interfaces; 1388 acm->writesize = usb_endpoint_maxp(epwrite) * 20; 1389 acm->control = control_interface; 1390 acm->data = data_interface; 1391 acm->minor = minor; 1392 acm->dev = usb_dev; 1393 acm->ctrl_caps = ac_management_function; 1394 if (quirks & NO_CAP_LINE) 1395 acm->ctrl_caps &= ~USB_CDC_CAP_LINE; 1396 acm->ctrlsize = ctrlsize; 1397 acm->readsize = readsize; 1398 acm->rx_buflimit = num_rx_buf; 1399 INIT_WORK(&acm->work, acm_softint); 1400 init_waitqueue_head(&acm->wioctl); 1401 spin_lock_init(&acm->write_lock); 1402 spin_lock_init(&acm->read_lock); 1403 mutex_init(&acm->mutex); 1404 acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); 1405 acm->is_int_ep = usb_endpoint_xfer_int(epread); 1406 if (acm->is_int_ep) 1407 acm->bInterval = epread->bInterval; 1408 tty_port_init(&acm->port); 1409 acm->port.ops = &acm_port_ops; 1410 init_usb_anchor(&acm->delayed); 1411 acm->quirks = quirks; 1412 1413 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); 1414 if (!buf) 1415 goto alloc_fail2; 1416 acm->ctrl_buffer = buf; 1417 1418 if (acm_write_buffers_alloc(acm) < 0) 1419 goto alloc_fail4; 1420 1421 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); 1422 if (!acm->ctrlurb) 1423 goto alloc_fail5; 1424 1425 for (i = 0; i < num_rx_buf; i++) { 1426 struct acm_rb *rb = &(acm->read_buffers[i]); 1427 struct urb *urb; 1428 1429 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL, 1430 &rb->dma); 1431 if (!rb->base) 1432 goto alloc_fail6; 1433 rb->index = i; 1434 rb->instance = acm; 1435 1436 urb = usb_alloc_urb(0, GFP_KERNEL); 1437 if (!urb) 1438 goto alloc_fail6; 1439 1440 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1441 urb->transfer_dma = rb->dma; 1442 if (acm->is_int_ep) { 1443 usb_fill_int_urb(urb, acm->dev, 1444 acm->rx_endpoint, 1445 rb->base, 1446 acm->readsize, 1447 acm_read_bulk_callback, rb, 1448 acm->bInterval); 1449 } else { 1450 usb_fill_bulk_urb(urb, acm->dev, 1451 acm->rx_endpoint, 1452 rb->base, 1453 acm->readsize, 1454 acm_read_bulk_callback, rb); 1455 } 1456 1457 acm->read_urbs[i] = urb; 1458 __set_bit(i, &acm->read_urbs_free); 1459 } 1460 for (i = 0; i < ACM_NW; i++) { 1461 struct acm_wb *snd = &(acm->wb[i]); 1462 1463 snd->urb = usb_alloc_urb(0, GFP_KERNEL); 1464 if (snd->urb == NULL) 1465 goto alloc_fail7; 1466 1467 if (usb_endpoint_xfer_int(epwrite)) 1468 usb_fill_int_urb(snd->urb, usb_dev, 1469 usb_sndintpipe(usb_dev, epwrite->bEndpointAddress), 1470 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval); 1471 else 1472 usb_fill_bulk_urb(snd->urb, usb_dev, 1473 usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress), 1474 NULL, acm->writesize, acm_write_bulk, snd); 1475 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1476 if (quirks & SEND_ZERO_PACKET) 1477 snd->urb->transfer_flags |= URB_ZERO_PACKET; 1478 snd->instance = acm; 1479 } 1480 1481 usb_set_intfdata(intf, acm); 1482 1483 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities); 1484 if (i < 0) 1485 goto alloc_fail7; 1486 1487 if (cfd) { /* export the country data */ 1488 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL); 1489 if (!acm->country_codes) 1490 goto skip_countries; 1491 acm->country_code_size = cfd->bLength - 4; 1492 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0, 1493 cfd->bLength - 4); 1494 acm->country_rel_date = cfd->iCountryCodeRelDate; 1495 1496 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes); 1497 if (i < 0) { 1498 kfree(acm->country_codes); 1499 acm->country_codes = NULL; 1500 acm->country_code_size = 0; 1501 goto skip_countries; 1502 } 1503 1504 i = device_create_file(&intf->dev, 1505 &dev_attr_iCountryCodeRelDate); 1506 if (i < 0) { 1507 device_remove_file(&intf->dev, &dev_attr_wCountryCodes); 1508 kfree(acm->country_codes); 1509 acm->country_codes = NULL; 1510 acm->country_code_size = 0; 1511 goto skip_countries; 1512 } 1513 } 1514 1515 skip_countries: 1516 usb_fill_int_urb(acm->ctrlurb, usb_dev, 1517 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), 1518 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, 1519 /* works around buggy devices */ 1520 epctrl->bInterval ? epctrl->bInterval : 16); 1521 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1522 acm->ctrlurb->transfer_dma = acm->ctrl_dma; 1523 1524 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); 1525 1526 acm->line.dwDTERate = cpu_to_le32(9600); 1527 acm->line.bDataBits = 8; 1528 acm_set_line(acm, &acm->line); 1529 1530 usb_driver_claim_interface(&acm_driver, data_interface, acm); 1531 usb_set_intfdata(data_interface, acm); 1532 1533 usb_get_intf(control_interface); 1534 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor, 1535 &control_interface->dev); 1536 if (IS_ERR(tty_dev)) { 1537 rv = PTR_ERR(tty_dev); 1538 goto alloc_fail8; 1539 } 1540 1541 if (quirks & CLEAR_HALT_CONDITIONS) { 1542 usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress)); 1543 usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress)); 1544 } 1545 1546 return 0; 1547 alloc_fail8: 1548 if (acm->country_codes) { 1549 device_remove_file(&acm->control->dev, 1550 &dev_attr_wCountryCodes); 1551 device_remove_file(&acm->control->dev, 1552 &dev_attr_iCountryCodeRelDate); 1553 kfree(acm->country_codes); 1554 } 1555 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1556 alloc_fail7: 1557 usb_set_intfdata(intf, NULL); 1558 for (i = 0; i < ACM_NW; i++) 1559 usb_free_urb(acm->wb[i].urb); 1560 alloc_fail6: 1561 for (i = 0; i < num_rx_buf; i++) 1562 usb_free_urb(acm->read_urbs[i]); 1563 acm_read_buffers_free(acm); 1564 usb_free_urb(acm->ctrlurb); 1565 alloc_fail5: 1566 acm_write_buffers_free(acm); 1567 alloc_fail4: 1568 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1569 alloc_fail2: 1570 acm_release_minor(acm); 1571 kfree(acm); 1572 alloc_fail: 1573 return rv; 1574 } 1575 1576 static void stop_data_traffic(struct acm *acm) 1577 { 1578 int i; 1579 1580 dev_dbg(&acm->control->dev, "%s\n", __func__); 1581 1582 usb_kill_urb(acm->ctrlurb); 1583 for (i = 0; i < ACM_NW; i++) 1584 usb_kill_urb(acm->wb[i].urb); 1585 for (i = 0; i < acm->rx_buflimit; i++) 1586 usb_kill_urb(acm->read_urbs[i]); 1587 1588 cancel_work_sync(&acm->work); 1589 } 1590 1591 static void acm_disconnect(struct usb_interface *intf) 1592 { 1593 struct acm *acm = usb_get_intfdata(intf); 1594 struct usb_device *usb_dev = interface_to_usbdev(intf); 1595 struct tty_struct *tty; 1596 int i; 1597 1598 dev_dbg(&intf->dev, "%s\n", __func__); 1599 1600 /* sibling interface is already cleaning up */ 1601 if (!acm) 1602 return; 1603 1604 mutex_lock(&acm->mutex); 1605 acm->disconnected = true; 1606 if (acm->country_codes) { 1607 device_remove_file(&acm->control->dev, 1608 &dev_attr_wCountryCodes); 1609 device_remove_file(&acm->control->dev, 1610 &dev_attr_iCountryCodeRelDate); 1611 } 1612 wake_up_all(&acm->wioctl); 1613 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1614 usb_set_intfdata(acm->control, NULL); 1615 usb_set_intfdata(acm->data, NULL); 1616 mutex_unlock(&acm->mutex); 1617 1618 tty = tty_port_tty_get(&acm->port); 1619 if (tty) { 1620 tty_vhangup(tty); 1621 tty_kref_put(tty); 1622 } 1623 1624 stop_data_traffic(acm); 1625 1626 tty_unregister_device(acm_tty_driver, acm->minor); 1627 1628 usb_free_urb(acm->ctrlurb); 1629 for (i = 0; i < ACM_NW; i++) 1630 usb_free_urb(acm->wb[i].urb); 1631 for (i = 0; i < acm->rx_buflimit; i++) 1632 usb_free_urb(acm->read_urbs[i]); 1633 acm_write_buffers_free(acm); 1634 usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1635 acm_read_buffers_free(acm); 1636 1637 if (!acm->combined_interfaces) 1638 usb_driver_release_interface(&acm_driver, intf == acm->control ? 1639 acm->data : acm->control); 1640 1641 tty_port_put(&acm->port); 1642 } 1643 1644 #ifdef CONFIG_PM 1645 static int acm_suspend(struct usb_interface *intf, pm_message_t message) 1646 { 1647 struct acm *acm = usb_get_intfdata(intf); 1648 int cnt; 1649 1650 spin_lock_irq(&acm->write_lock); 1651 if (PMSG_IS_AUTO(message)) { 1652 if (acm->transmitting) { 1653 spin_unlock_irq(&acm->write_lock); 1654 return -EBUSY; 1655 } 1656 } 1657 cnt = acm->susp_count++; 1658 spin_unlock_irq(&acm->write_lock); 1659 1660 if (cnt) 1661 return 0; 1662 1663 stop_data_traffic(acm); 1664 1665 return 0; 1666 } 1667 1668 static int acm_resume(struct usb_interface *intf) 1669 { 1670 struct acm *acm = usb_get_intfdata(intf); 1671 struct urb *urb; 1672 int rv = 0; 1673 1674 spin_lock_irq(&acm->write_lock); 1675 1676 if (--acm->susp_count) 1677 goto out; 1678 1679 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) { 1680 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC); 1681 1682 for (;;) { 1683 urb = usb_get_from_anchor(&acm->delayed); 1684 if (!urb) 1685 break; 1686 1687 acm_start_wb(acm, urb->context); 1688 } 1689 1690 /* 1691 * delayed error checking because we must 1692 * do the write path at all cost 1693 */ 1694 if (rv < 0) 1695 goto out; 1696 1697 rv = acm_submit_read_urbs(acm, GFP_ATOMIC); 1698 } 1699 out: 1700 spin_unlock_irq(&acm->write_lock); 1701 1702 return rv; 1703 } 1704 1705 static int acm_reset_resume(struct usb_interface *intf) 1706 { 1707 struct acm *acm = usb_get_intfdata(intf); 1708 1709 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) 1710 tty_port_tty_hangup(&acm->port, false); 1711 1712 return acm_resume(intf); 1713 } 1714 1715 #endif /* CONFIG_PM */ 1716 1717 #define NOKIA_PCSUITE_ACM_INFO(x) \ 1718 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \ 1719 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1720 USB_CDC_ACM_PROTO_VENDOR) 1721 1722 #define SAMSUNG_PCSUITE_ACM_INFO(x) \ 1723 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \ 1724 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1725 USB_CDC_ACM_PROTO_VENDOR) 1726 1727 /* 1728 * USB driver structure. 1729 */ 1730 1731 static const struct usb_device_id acm_ids[] = { 1732 /* quirky and broken devices */ 1733 { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */ 1734 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1735 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */ 1736 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1737 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */ 1738 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1739 }, 1740 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */ 1741 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1742 }, 1743 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */ 1744 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1745 }, 1746 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */ 1747 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1748 }, 1749 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */ 1750 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1751 }, 1752 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */ 1753 .driver_info = SINGLE_RX_URB, 1754 }, 1755 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */ 1756 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1757 }, 1758 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */ 1759 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1760 }, 1761 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */ 1762 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1763 }, 1764 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */ 1765 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1766 }, 1767 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */ 1768 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1769 }, 1770 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */ 1771 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1772 }, 1773 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */ 1774 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1775 }, 1776 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */ 1777 .driver_info = QUIRK_CONTROL_LINE_STATE, }, 1778 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */ 1779 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */ 1780 }, 1781 /* Motorola H24 HSPA module: */ 1782 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */ 1783 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */ 1784 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1785 }, 1786 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */ 1787 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1788 }, 1789 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */ 1790 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1791 }, 1792 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */ 1793 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1794 }, 1795 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */ 1796 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1797 }, 1798 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */ 1799 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1800 }, 1801 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */ 1802 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1803 }, 1804 1805 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */ 1806 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on 1807 data interface instead of 1808 communications interface. 1809 Maybe we should define a new 1810 quirk for this. */ 1811 }, 1812 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */ 1813 .driver_info = NO_UNION_NORMAL, 1814 }, 1815 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */ 1816 .driver_info = NO_UNION_NORMAL, 1817 }, 1818 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */ 1819 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1820 }, 1821 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */ 1822 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1823 }, 1824 1825 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */ 1826 .driver_info = CLEAR_HALT_CONDITIONS, 1827 }, 1828 1829 /* Nokia S60 phones expose two ACM channels. The first is 1830 * a modem and is picked up by the standard AT-command 1831 * information below. The second is 'vendor-specific' but 1832 * is treated as a serial device at the S60 end, so we want 1833 * to expose it on Linux too. */ 1834 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */ 1835 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */ 1836 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */ 1837 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */ 1838 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */ 1839 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */ 1840 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */ 1841 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */ 1842 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */ 1843 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */ 1844 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */ 1845 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */ 1846 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */ 1847 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */ 1848 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */ 1849 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */ 1850 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */ 1851 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */ 1852 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */ 1853 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */ 1854 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */ 1855 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */ 1856 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */ 1857 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */ 1858 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */ 1859 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */ 1860 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */ 1861 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */ 1862 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */ 1863 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */ 1864 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */ 1865 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */ 1866 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1867 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */ 1868 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */ 1869 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */ 1870 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */ 1871 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */ 1872 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */ 1873 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */ 1874 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1875 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */ 1876 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */ 1877 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */ 1878 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */ 1879 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */ 1880 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */ 1881 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */ 1882 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */ 1883 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */ 1884 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */ 1885 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */ 1886 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */ 1887 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */ 1888 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */ 1889 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */ 1890 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */ 1891 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */ 1892 1893 /* Support for Owen devices */ 1894 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */ 1895 1896 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */ 1897 1898 /* Support for Droids MuIn LCD */ 1899 { USB_DEVICE(0x04d8, 0x000b), 1900 .driver_info = NO_DATA_INTERFACE, 1901 }, 1902 1903 #if IS_ENABLED(CONFIG_INPUT_IMS_PCU) 1904 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */ 1905 .driver_info = IGNORE_DEVICE, 1906 }, 1907 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */ 1908 .driver_info = IGNORE_DEVICE, 1909 }, 1910 #endif 1911 1912 /*Samsung phone in firmware update mode */ 1913 { USB_DEVICE(0x04e8, 0x685d), 1914 .driver_info = IGNORE_DEVICE, 1915 }, 1916 1917 /* Exclude Infineon Flash Loader utility */ 1918 { USB_DEVICE(0x058b, 0x0041), 1919 .driver_info = IGNORE_DEVICE, 1920 }, 1921 1922 /* control interfaces without any protocol set */ 1923 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1924 USB_CDC_PROTO_NONE) }, 1925 1926 /* control interfaces with various AT-command sets */ 1927 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1928 USB_CDC_ACM_PROTO_AT_V25TER) }, 1929 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1930 USB_CDC_ACM_PROTO_AT_PCCA101) }, 1931 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1932 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) }, 1933 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1934 USB_CDC_ACM_PROTO_AT_GSM) }, 1935 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1936 USB_CDC_ACM_PROTO_AT_3G) }, 1937 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1938 USB_CDC_ACM_PROTO_AT_CDMA) }, 1939 1940 { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */ 1941 .driver_info = SEND_ZERO_PACKET, 1942 }, 1943 1944 { } 1945 }; 1946 1947 MODULE_DEVICE_TABLE(usb, acm_ids); 1948 1949 static struct usb_driver acm_driver = { 1950 .name = "cdc_acm", 1951 .probe = acm_probe, 1952 .disconnect = acm_disconnect, 1953 #ifdef CONFIG_PM 1954 .suspend = acm_suspend, 1955 .resume = acm_resume, 1956 .reset_resume = acm_reset_resume, 1957 #endif 1958 .id_table = acm_ids, 1959 #ifdef CONFIG_PM 1960 .supports_autosuspend = 1, 1961 #endif 1962 .disable_hub_initiated_lpm = 1, 1963 }; 1964 1965 /* 1966 * TTY driver structures. 1967 */ 1968 1969 static const struct tty_operations acm_ops = { 1970 .install = acm_tty_install, 1971 .open = acm_tty_open, 1972 .close = acm_tty_close, 1973 .cleanup = acm_tty_cleanup, 1974 .hangup = acm_tty_hangup, 1975 .write = acm_tty_write, 1976 .put_char = acm_tty_put_char, 1977 .flush_chars = acm_tty_flush_chars, 1978 .write_room = acm_tty_write_room, 1979 .ioctl = acm_tty_ioctl, 1980 .throttle = acm_tty_throttle, 1981 .unthrottle = acm_tty_unthrottle, 1982 .chars_in_buffer = acm_tty_chars_in_buffer, 1983 .break_ctl = acm_tty_break_ctl, 1984 .set_termios = acm_tty_set_termios, 1985 .tiocmget = acm_tty_tiocmget, 1986 .tiocmset = acm_tty_tiocmset, 1987 }; 1988 1989 /* 1990 * Init / exit. 1991 */ 1992 1993 static int __init acm_init(void) 1994 { 1995 int retval; 1996 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS); 1997 if (!acm_tty_driver) 1998 return -ENOMEM; 1999 acm_tty_driver->driver_name = "acm", 2000 acm_tty_driver->name = "ttyACM", 2001 acm_tty_driver->major = ACM_TTY_MAJOR, 2002 acm_tty_driver->minor_start = 0, 2003 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, 2004 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, 2005 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 2006 acm_tty_driver->init_termios = tty_std_termios; 2007 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | 2008 HUPCL | CLOCAL; 2009 tty_set_operations(acm_tty_driver, &acm_ops); 2010 2011 retval = tty_register_driver(acm_tty_driver); 2012 if (retval) { 2013 put_tty_driver(acm_tty_driver); 2014 return retval; 2015 } 2016 2017 retval = usb_register(&acm_driver); 2018 if (retval) { 2019 tty_unregister_driver(acm_tty_driver); 2020 put_tty_driver(acm_tty_driver); 2021 return retval; 2022 } 2023 2024 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); 2025 2026 return 0; 2027 } 2028 2029 static void __exit acm_exit(void) 2030 { 2031 usb_deregister(&acm_driver); 2032 tty_unregister_driver(acm_tty_driver); 2033 put_tty_driver(acm_tty_driver); 2034 idr_destroy(&acm_minors); 2035 } 2036 2037 module_init(acm_init); 2038 module_exit(acm_exit); 2039 2040 MODULE_AUTHOR(DRIVER_AUTHOR); 2041 MODULE_DESCRIPTION(DRIVER_DESC); 2042 MODULE_LICENSE("GPL"); 2043 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR); 2044