#! /bin/sh # Script to apply kernel patches. # usage: patch-kernel [ sourcedir [ patchdir [ stopversion ] [ -acxx ] ] ] # The source directory defaults to /usr/src/linux, and the patch # directory defaults to the current directory. # e.g. # scripts/patch-kernel . .. # Update the kernel tree in the current directory using patches in the # directory above to the latest Linus kernel # scripts/patch-kernel . .. -ac # Get the latest Linux kernel and patch it with the latest ac patch # scripts/patch-kernel . .. 2.4.9 # Gets standard kernel 2.4.9 # scripts/patch-kernel . .. 2.4.9 -ac # Gets 2.4.9 with latest ac patches # scripts/patch-kernel . .. 2.4.9 -ac11 # Gets 2.4.9 with ac patch ac11 # Note: It uses the patches relative to the Linus kernels, not the # ac to ac relative patches # # It determines the current kernel version from the top-level Makefile. # It then looks for patches for the next sublevel in the patch directory. # This is applied using "patch -p1 -s" from within the kernel directory. # A check is then made for "*.rej" files to see if the patch was # successful. If it is, then all of the "*.orig" files are removed. # # Nick Holloway , 2nd January 1995. # # Added support for handling multiple types of compression. What includes # gzip, bzip, bzip2, zip, compress, and plaintext. # # Adam Sulmicki , 1st January 1997. # # Added ability to stop at a given version number # Put the full version number (i.e. 2.3.31) as the last parameter # Dave Gilbert , 11th December 1999. # Fixed previous patch so that if we are already at the correct version # not to patch up. # # Added -ac option, use -ac or -ac9 (say) to stop at a particular version # Dave Gilbert , 29th September 2001. # # Add support for (use of) EXTRAVERSION (to support 2.6.8.x, e.g.); # update usage message; # fix some whitespace damage; # be smarter about stopping when current version is larger than requested; # Randy Dunlap , 2004-AUG-18. # # Add better support for (non-incremental) 2.6.x.y patches; # If an ending version number if not specified, the script automatically # increments the SUBLEVEL (x in 2.6.x.y) until no more patch files are found; # however, EXTRAVERSION (y in 2.6.x.y) is never automatically incremented # but must be specified fully. # # patch-kernel does not normally support reverse patching, but does so when # applying EXTRAVERSION (x.y) patches, so that moving from 2.6.11.y to 2.6.11.z # is easy and handled by the script (reverse 2.6.11.y and apply 2.6.11.z). # Randy Dunlap , 2005-APR-08. PNAME=patch-kernel # Set directories from arguments, or use defaults. sourcedir=${1-/usr/src/linux} patchdir=${2-.} stopvers=${3-default} if [ "$1" = -h -o "$1" = --help -o ! -r "$sourcedir/Makefile" ]; then cat << USAGE usage: $PNAME [-h] [ sourcedir [ patchdir [ stopversion ] [ -acxx ] ] ] source directory defaults to /usr/src/linux, patch directory defaults to the current directory, stopversion defaults to . USAGE exit 1 fi # See if we have any -ac options for PARM in $* do case $PARM in -ac*) gotac=$PARM; esac; done # --------------------------------------------------------------------------- # arg1 is filename noFile () { echo "cannot find patch file: ${patch}" exit 1 } # --------------------------------------------------------------------------- backwards () { echo "$PNAME does not support reverse patching" exit 1 } # --------------------------------------------------------------------------- # Find a file, first parameter is basename of file # it tries many compression mechanisms and sets variables to say how to get it findFile () { filebase=$1; if [ -r ${filebase}.gz ]; then ext=".gz" name="gzip" uncomp="gunzip -dc" elif [ -r ${filebase}.bz ]; then ext=".bz" name="bzip" uncomp="bunzip -dc" elif [ -r ${filebase}.bz2 ]; then ext=".bz2" name="bzip2" uncomp="bunzip2 -dc" elif [ -r ${filebase}.zip ]; then ext=".zip" name="zip" uncomp="unzip -d" elif [ -r ${filebase}.Z ]; then ext=".Z" name="uncompress" uncomp="uncompress -c" elif [ -r ${filebase} ]; then ext="" name="plaintext" uncomp="cat" else return 1; fi return 0; } # --------------------------------------------------------------------------- # Apply a patch and check it goes in cleanly # First param is patch name (e.g. patch-2.4.9-ac5) - without path or extension applyPatch () { echo -n "Applying $1 (${name})... " if $uncomp ${patchdir}/$1${ext} | patch -p1 -s -N -E -d $sourcedir then echo "done." else echo "failed. Clean up yourself." return 1; fi if [ "`find $sourcedir/ '(' -name '*.rej' -o -name '.*.rej' ')' -print`" ] then echo "Aborting. Reject files found." return 1; fi # Remove backup files find $sourcedir/ '(' -name '*.orig' -o -name '.*.orig' ')' -exec rm -f {} \; return 0; } # --------------------------------------------------------------------------- # arg1 is patch filename reversePatch () { echo -n "Reversing $1 (${name}) ... " if $uncomp ${patchdir}/"$1"${ext} | patch -p1 -Rs -N -E -d $sourcedir then echo "done." else echo "failed. Clean it up." exit 1 fi if [ "`find $sourcedir/ '(' -name '*.rej' -o -name '.*.rej' ')' -print`" ] then echo "Aborting. Reject files found." return 1 fi # Remove backup files find $sourcedir/ '(' -name '*.orig' -o -name '.*.orig' ')' -exec rm -f {} \; return 0 } # set current VERSION, PATCHLEVEL, SUBLEVEL, EXTRAVERSION # force $TMPFILEs below to be in local directory: a slash character prevents # the dot command from using the search path. TMPFILE=`mktemp ./.tmpver.XXXXXX` || { echo "cannot make temp file" ; exit 1; } grep -E "^(VERSION|PATCHLEVEL|SUBLEVEL|EXTRAVERSION)" $sourcedir/Makefile > $TMPFILE tr -d [:blank:] < $TMPFILE > $TMPFILE.1 . $TMPFILE.1 rm -f $TMPFILE* if [ -z "$VERSION" -o -z "$PATCHLEVEL" -o -z "$SUBLEVEL" ] then echo "unable to determine current kernel version" >&2 exit 1 fi NAME=`grep ^NAME $sourcedir/Makefile` NAME=${NAME##*=} echo "Current kernel version is $VERSION.$PATCHLEVEL.$SUBLEVEL${EXTRAVERSION} ($NAME)" # strip EXTRAVERSION to just a number (drop leading '.' and trailing additions) EXTRAVER= if [ x$EXTRAVERSION != "x" ] then EXTRAVER=${EXTRAVERSION#.} EXTRAVER=${EXTRAVER%%[[:punct:]]*} #echo "$PNAME: changing EXTRAVERSION from $EXTRAVERSION to $EXTRAVER" fi #echo "stopvers=$stopvers" if [ $stopvers != "default" ]; then STOPSUBLEVEL=`echo $stopvers | cut -d. -f3` STOPEXTRA=`echo $stopvers | cut -d. -f4` #echo "#___STOPSUBLEVEL=/$STOPSUBLEVEL/, STOPEXTRA=/$STOPEXTRA/" else STOPSUBLEVEL=9999 STOPEXTRA=9999 fi # This all assumes a 2.6.x[.y] kernel tree. # Don't allow backwards/reverse patching. if [ $STOPSUBLEVEL -lt $SUBLEVEL ]; then backwards fi if [ x$EXTRAVER != "x" ]; then CURRENTFULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL.$EXTRAVER" else CURRENTFULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL" fi if [ x$EXTRAVER != "x" ]; then echo "backing up to: $VERSION.$PATCHLEVEL.$SUBLEVEL" patch="patch-${CURRENTFULLVERSION}" findFile $patchdir/${patch} || noFile ${patch} reversePatch ${patch} || exit 1 fi # now current is 2.6.x, with no EXTRA applied, # so update to target SUBLEVEL (2.6.SUBLEVEL) # and then to target EXTRAVER (2.6.SUB.EXTRAVER) if requested. # If not ending sublevel is specified, it is incremented until # no further sublevels are found. if [ $STOPSUBLEVEL -gt $SUBLEVEL ]; then while : # incrementing SUBLEVEL (s in v.p.s) do CURRENTFULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL" EXTRAVER= if [ $stopvers = $CURRENTFULLVERSION ]; then echo "Stopping at $CURRENTFULLVERSION base as requested." break fi SUBLEVEL=$(($SUBLEVEL + 1)) FULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL" #echo "#___ trying $FULLVERSION ___" if [ $(($SUBLEVEL)) -gt $(($STOPSUBLEVEL)) ]; then echo "Stopping since sublevel ($SUBLEVEL) is beyond stop-sublevel ($STOPSUBLEVEL)" exit 1 fi patch=patch-$FULLVERSION # See if the file exists and find extension findFile $patchdir/${patch} || noFile ${patch} # Apply the patch and check all is OK applyPatch $patch || break done #echo "#___sublevel all done" fi # There is no incremental searching for extraversion... if [ "$STOPEXTRA" != "" ]; then while : # just to allow break do # apply STOPEXTRA directly (not incrementally) (x in v.p.s.x) FULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL.$STOPEXTRA" #echo "#... trying $FULLVERSION ..." patch=patch-$FULLVERSION # See if the file exists and find extension findFile $patchdir/${patch} || noFile ${patch} # Apply the patch and check all is OK applyPatch $patch || break #echo "#___extraver all done" break done fi if [ x$gotac != x ]; then # Out great user wants the -ac patches # They could have done -ac (get latest) or -acxx where xx=version they want if [ $gotac = "-ac" ]; then # They want the latest version HIGHESTPATCH=0 for PATCHNAMES in $patchdir/patch-${CURRENTFULLVERSION}-ac*\.* do ACVALUE=`echo $PATCHNAMES | sed -e 's/^.*patch-[0-9.]*-ac\([0-9]*\).*/\1/'` # Check it is actually a recognised patch type findFile $patchdir/patch-${CURRENTFULLVERSION}-ac${ACVALUE} || break if [ $ACVALUE -gt $HIGHESTPATCH ]; then HIGHESTPATCH=$ACVALUE fi done if [ $HIGHESTPATCH -ne 0 ]; then findFile $patchdir/patch-${CURRENTFULLVERSION}-ac${HIGHESTPATCH} || break applyPatch patch-${CURRENTFULLVERSION}-ac${HIGHESTPATCH} else echo "No -ac patches found" fi else # They want an exact version findFile $patchdir/patch-${CURRENTFULLVERSION}${gotac} || { echo "Sorry, I couldn't find the $gotac patch for $CURRENTFULLVERSION. Hohum." exit 1 } applyPatch patch-${CURRENTFULLVERSION}${gotac} fi fi 2' href='#n162'>162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 
/*
 * USB Serial Converter driver
 *
 * Copyright (C) 1999 - 2005 Greg Kroah-Hartman (greg@kroah.com)
 * Copyright (C) 2000 Peter Berger (pberger@brimson.com)
 * Copyright (C) 2000 Al Borchers (borchers@steinerpoint.com)
 *
 *	This program is free software; you can redistribute it and/or
 *	modify it under the terms of the GNU General Public License version
 *	2 as published by the Free Software Foundation.
 *
 * This driver was originally based on the ACM driver by Armin Fuerst (which was
 * based on a driver by Brad Keryan)
 *
 * See Documentation/usb/usb-serial.txt for more information on using this driver
 *
 */

#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/tty.h>
#include <linux/tty_driver.h>
#include <linux/tty_flip.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/spinlock.h>
#include <linux/list.h>
#include <linux/smp_lock.h>
#include <asm/uaccess.h>
#include <linux/usb.h>
#include "usb-serial.h"
#include "pl2303.h"

/*
 * Version Information
 */
#define DRIVER_AUTHOR "Greg Kroah-Hartman, greg@kroah.com, http://www.kroah.com/linux/"
#define DRIVER_DESC "USB Serial Driver core"

/* Driver structure we register with the USB core */
static struct usb_driver usb_serial_driver = {
	.name =		"usbserial",
	.probe =	usb_serial_probe,
	.disconnect =	usb_serial_disconnect,
	.no_dynamic_id = 	1,
};

/* There is no MODULE_DEVICE_TABLE for usbserial.c.  Instead
   the MODULE_DEVICE_TABLE declarations in each serial driver
   cause the "hotplug" program to pull in whatever module is necessary
   via modprobe, and modprobe will load usbserial because the serial
   drivers depend on it.
*/

static int debug;
static struct usb_serial *serial_table[SERIAL_TTY_MINORS];	/* initially all NULL */
static LIST_HEAD(usb_serial_driver_list);

struct usb_serial *usb_serial_get_by_index(unsigned index)
{
	struct usb_serial *serial = serial_table[index];

	if (serial)
		kref_get(&serial->kref);
	return serial;
}

static struct usb_serial *get_free_serial (struct usb_serial *serial, int num_ports, unsigned int *minor)
{
	unsigned int i, j;
	int good_spot;

	dbg("%s %d", __FUNCTION__, num_ports);

	*minor = 0;
	for (i = 0; i < SERIAL_TTY_MINORS; ++i) {
		if (serial_table[i])
			continue;

		good_spot = 1;
		for (j = 1; j <= num_ports-1; ++j)
			if ((i+j >= SERIAL_TTY_MINORS) || (serial_table[i+j])) {
				good_spot = 0;
				i += j;
				break;
			}
		if (good_spot == 0)
			continue;

		*minor = i;
		dbg("%s - minor base = %d", __FUNCTION__, *minor);
		for (i = *minor; (i < (*minor + num_ports)) && (i < SERIAL_TTY_MINORS); ++i)
			serial_table[i] = serial;
		return serial;
	}
	return NULL;
}

static void return_serial(struct usb_serial *serial)
{
	int i;

	dbg("%s", __FUNCTION__);

	if (serial == NULL)
		return;

	for (i = 0; i < serial->num_ports; ++i) {
		serial_table[serial->minor + i] = NULL;
	}
}

static void destroy_serial(struct kref *kref)
{
	struct usb_serial *serial;
	struct usb_serial_port *port;
	int i;

	serial = to_usb_serial(kref);

	dbg("%s - %s", __FUNCTION__, serial->type->description);

	serial->type->shutdown(serial);

	/* return the minor range that this device had */
	return_serial(serial);

	for (i = 0; i < serial->num_ports; ++i)
		serial->port[i]->open_count = 0;

	/* the ports are cleaned up and released in port_release() */
	for (i = 0; i < serial->num_ports; ++i)
		if (serial->port[i]->dev.parent != NULL) {
			device_unregister(&serial->port[i]->dev);
			serial->port[i] = NULL;
		}

	/* If this is a "fake" port, we have to clean it up here, as it will
	 * not get cleaned up in port_release() as it was never registered with
	 * the driver core */
	if (serial->num_ports < serial->num_port_pointers) {
		for (i = serial->num_ports; i < serial->num_port_pointers; ++i) {
			port = serial->port[i];
			if (!port)
				continue;
			usb_kill_urb(port->read_urb);
			usb_free_urb(port->read_urb);
			usb_kill_urb(port->write_urb);
			usb_free_urb(port->write_urb);
			usb_kill_urb(port->interrupt_in_urb);
			usb_free_urb(port->interrupt_in_urb);
			usb_kill_urb(port->interrupt_out_urb);
			usb_free_urb(port->interrupt_out_urb);
			kfree(port->bulk_in_buffer);
			kfree(port->bulk_out_buffer);
			kfree(port->interrupt_in_buffer);
			kfree(port->interrupt_out_buffer);
		}
	}

	usb_put_dev(serial->dev);

	/* free up any memory that we allocated */
	kfree (serial);
}

/*****************************************************************************
 * Driver tty interface functions
 *****************************************************************************/
static int serial_open (struct tty_struct *tty, struct file * filp)
{
	struct usb_serial *serial;
	struct usb_serial_port *port;
	unsigned int portNumber;
	int retval;
	
	dbg("%s", __FUNCTION__);

	/* get the serial object associated with this tty pointer */
	serial = usb_serial_get_by_index(tty->index);
	if (!serial) {
		tty->driver_data = NULL;
		return -ENODEV;
	}

	portNumber = tty->index - serial->minor;
	port = serial->port[portNumber];
	 
	++port->open_count;

	if (port->open_count == 1) {

		/* set up our port structure making the tty driver
		 * remember our port object, and us it */
		tty->driver_data = port;
		port->tty = tty;

		/* lock this module before we call it
		 * this may fail, which means we must bail out,
		 * safe because we are called with BKL held */
		if (!try_module_get(serial->type->driver.owner)) {
			retval = -ENODEV;
			goto bailout_kref_put;
		}

		/* only call the device specific open if this 
		 * is the first time the port is opened */
		retval = serial->type->open(port, filp);
		if (retval)
			goto bailout_module_put;
	}

	return 0;

bailout_module_put:
	module_put(serial->type->driver.owner);
bailout_kref_put:
	kref_put(&serial->kref, destroy_serial);
	port->open_count = 0;
	return retval;
}

static void serial_close(struct tty_struct *tty, struct file * filp)
{
	struct usb_serial_port *port = tty->driver_data;

	if (!port)
		return;

	dbg("%s - port %d", __FUNCTION__, port->number);

	if (port->open_count == 0)
		return;

	--port->open_count;
	if (port->open_count == 0) {
		/* only call the device specific close if this 
		 * port is being closed by the last owner */
		port->serial->type->close(port, filp);

		if (port->tty) {
			if (port->tty->driver_data)
				port->tty->driver_data = NULL;
			port->tty = NULL;
		}

		module_put(port->serial->type->driver.owner);
	}

	kref_put(&port->serial->kref, destroy_serial);
}

static int serial_write (struct tty_struct * tty, const unsigned char *buf, int count)
{
	struct usb_serial_port *port = tty->driver_data;
	int retval = -EINVAL;

	dbg("%s - port %d, %d byte(s)", __FUNCTION__, port->number, count);

	if (!port->open_count) {
		dbg("%s - port not opened", __FUNCTION__);
		goto exit;
	}

	/* pass on to the driver specific version of this function */
	retval = port->serial->type->write(port, buf, count);

exit:
	return retval;
}

static int serial_write_room (struct tty_struct *tty) 
{
	struct usb_serial_port *port = tty->driver_data;
	int retval = -EINVAL;

	dbg("%s - port %d", __FUNCTION__, port->number);

	if (!port->open_count) {
		dbg("%s - port not open", __FUNCTION__);
		goto exit;
	}

	/* pass on to the driver specific version of this function */
	retval = port->serial->type->write_room(port);

exit:
	return retval;
}

static int serial_chars_in_buffer (struct tty_struct *tty) 
{
	struct usb_serial_port *port = tty->driver_data;
	int retval = -EINVAL;

	dbg("%s = port %d", __FUNCTION__, port->number);

	if (!port->open_count) {
		dbg("%s - port not open", __FUNCTION__);
		goto exit;
	}

	/* pass on to the driver specific version of this function */
	retval = port->serial->type->chars_in_buffer(port);

exit:
	return retval;
}

static void serial_throttle (struct tty_struct * tty)
{
	struct usb_serial_port *port = tty->driver_data;

	dbg("%s - port %d", __FUNCTION__, port->number);

	if (!port->open_count) {
		dbg ("%s - port not open", __FUNCTION__);
		return;
	}

	/* pass on to the driver specific version of this function */
	if (port->serial->type->throttle)
		port->serial->type->throttle(port);
}

static void serial_unthrottle (struct tty_struct * tty)
{
	struct usb_serial_port *port = tty->driver_data;

	dbg("%s - port %d", __FUNCTION__, port->number);

	if (!port->open_count) {
		dbg("%s - port not open", __FUNCTION__);
		return;
	}

	/* pass on to the driver specific version of this function */
	if (port->serial->type->unthrottle)
		port->serial->type->unthrottle(port);
}

static int serial_ioctl (struct tty_struct *tty, struct file * file, unsigned int cmd, unsigned long arg)
{
	struct usb_serial_port *port = tty->driver_data;
	int retval = -ENODEV;

	dbg("%s - port %d, cmd 0x%.4x", __FUNCTION__, port->number, cmd);

	if (!port->open_count) {
		dbg ("%s - port not open", __FUNCTION__);
		goto exit;
	}

	/* pass on to the driver specific version of this function if it is available */
	if (port->serial->type->ioctl)
		retval = port->serial->type->ioctl(port, file, cmd, arg);
	else
		retval = -ENOIOCTLCMD;

exit:
	return retval;
}

static void serial_set_termios (struct tty_struct *tty, struct termios * old)
{
	struct usb_serial_port *port = tty->driver_data;

	dbg("%s - port %d", __FUNCTION__, port->number);

	if (!port->open_count) {
		dbg("%s - port not open", __FUNCTION__);
		return;
	}

	/* pass on to the driver specific version of this function if it is available */
	if (port->serial->type->set_termios)
		port->serial->type->set_termios(port, old);
}

static void serial_break (struct tty_struct *tty, int break_state)
{
	struct usb_serial_port *port = tty->driver_data;

	dbg("%s - port %d", __FUNCTION__, port->number);

	if (!port->open_count) {
		dbg("%s - port not open", __FUNCTION__);
		return;
	}

	/* pass on to the driver specific version of this function if it is available */
	if (port->serial->type->break_ctl)
		port->serial->type->break_ctl(port, break_state);
}

static int serial_read_proc (char *page, char **start, off_t off, int count, int *eof, void *data)
{
	struct usb_serial *serial;
	int length = 0;
	int i;
	off_t begin = 0;
	char tmp[40];

	dbg("%s", __FUNCTION__);
	length += sprintf (page, "usbserinfo:1.0 driver:2.0\n");
	for (i = 0; i < SERIAL_TTY_MINORS && length < PAGE_SIZE; ++i) {
		serial = usb_serial_get_by_index(i);
		if (serial == NULL)
			continue;

		length += sprintf (page+length, "%d:", i);
		if (serial->type->driver.owner)
			length += sprintf (page+length, " module:%s", module_name(serial->type->driver.owner));
		length += sprintf (page+length, " name:\"%s\"", serial->type->description);
		length += sprintf (page+length, " vendor:%04x product:%04x", 
				   le16_to_cpu(serial->dev->descriptor.idVendor), 
				   le16_to_cpu(serial->dev->descriptor.idProduct));
		length += sprintf (page+length, " num_ports:%d", serial->num_ports);
		length += sprintf (page+length, " port:%d", i - serial->minor + 1);

		usb_make_path(serial->dev, tmp, sizeof(tmp));
		length += sprintf (page+length, " path:%s", tmp);
			
		length += sprintf (page+length, "\n");
		if ((length + begin) > (off + count))
			goto done;
		if ((length + begin) < off) {
			begin += length;
			length = 0;
		}
		kref_put(&serial->kref, destroy_serial);
	}
	*eof = 1;
done:
	if (off >= (length + begin))
		return 0;
	*start = page + (off-begin);
	return ((count < begin+length-off) ? count : begin+length-off);
}

static int serial_tiocmget (struct tty_struct *tty, struct file *file)
{
	struct usb_serial_port *port = tty->driver_data;

	dbg("%s - port %d", __FUNCTION__, port->number);

	if (!port->open_count) {
		dbg("%s - port not open", __FUNCTION__);
		goto exit;
	}

	if (port->serial->type->tiocmget)
		return port->serial->type->tiocmget(port, file);

exit:
	return -EINVAL;
}

static int serial_tiocmset (struct tty_struct *tty, struct file *file,
			    unsigned int set, unsigned int clear)
{
	struct usb_serial_port *port = tty->driver_data;

	dbg("%s - port %d", __FUNCTION__, port->number);

	if (!port->open_count) {
		dbg("%s - port not open", __FUNCTION__);
		goto exit;
	}

	if (port->serial->type->tiocmset)
		return port->serial->type->tiocmset(port, file, set, clear);

exit:
	return -EINVAL;
}

void usb_serial_port_softint(void *private)
{
	struct usb_serial_port *port = private;
	struct tty_struct *tty;

	dbg("%s - port %d", __FUNCTION__, port->number);
	
	if (!port)
		return;

	tty = port->tty;
	if (!tty)
		return;

	tty_wakeup(tty);
}

static void port_release(struct device *dev)
{
	struct usb_serial_port *port = to_usb_serial_port(dev);

	dbg ("%s - %s", __FUNCTION__, dev->bus_id);
	usb_kill_urb(port->read_urb);
	usb_free_urb(port->read_urb);
	usb_kill_urb(port->write_urb);
	usb_free_urb(port->write_urb);
	usb_kill_urb(port->interrupt_in_urb);
	usb_free_urb(port->interrupt_in_urb);
	usb_kill_urb(port->interrupt_out_urb);
	usb_free_urb(port->interrupt_out_urb);
	kfree(port->bulk_in_buffer);
	kfree(port->bulk_out_buffer);
	kfree(port->interrupt_in_buffer);
	kfree(port->interrupt_out_buffer);
	kfree(port);
}

static struct usb_serial * create_serial (struct usb_device *dev, 
					  struct usb_interface *interface,
					  struct usb_serial_driver *driver)
{
	struct usb_serial *serial;

	serial = kmalloc (sizeof (*serial), GFP_KERNEL);
	if (!serial) {
		dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
		return NULL;
	}
	memset (serial, 0, sizeof(*serial));
	serial->dev = usb_get_dev(dev);
	serial->type = driver;
	serial->interface = interface;
	kref_init(&serial->kref);

	return serial;
}

static struct usb_serial_driver *search_serial_device(struct usb_interface *iface)
{
	struct list_head *p;
	const struct usb_device_id *id;
	struct usb_serial_driver *t;

	/* List trough know devices and see if the usb id matches */
	list_for_each(p, &usb_serial_driver_list) {
		t = list_entry(p, struct usb_serial_driver, driver_list);
		id = usb_match_id(iface, t->id_table);
		if (id != NULL) {
			dbg("descriptor matches");
			return t;
		}
	}

	return NULL;
}

int usb_serial_probe(struct usb_interface *interface,
			       const struct usb_device_id *id)
{
	struct usb_device *dev = interface_to_usbdev (interface);
	struct usb_serial *serial = NULL;
	struct usb_serial_port *port;
	struct usb_host_interface *iface_desc;
	struct usb_endpoint_descriptor *endpoint;
	struct usb_endpoint_descriptor *interrupt_in_endpoint[MAX_NUM_PORTS];
	struct usb_endpoint_descriptor *interrupt_out_endpoint[MAX_NUM_PORTS];
	struct usb_endpoint_descriptor *bulk_in_endpoint[MAX_NUM_PORTS];
	struct usb_endpoint_descriptor *bulk_out_endpoint[MAX_NUM_PORTS];
	struct usb_serial_driver *type = NULL;
	int retval;
	int minor;
	int buffer_size;
	int i;
	int num_interrupt_in = 0;
	int num_interrupt_out = 0;
	int num_bulk_in = 0;
	int num_bulk_out = 0;
	int num_ports = 0;
	int max_endpoints;

	type = search_serial_device(interface);
	if (!type) {
		dbg("none matched");
		return -ENODEV;
	}

	serial = create_serial (dev, interface, type);
	if (!serial) {
		dev_err(&interface->dev, "%s - out of memory\n", __FUNCTION__);
		return -ENOMEM;
	}

	/* if this device type has a probe function, call it */
	if (type->probe) {
		const struct usb_device_id *id;

		if (!try_module_get(type->driver.owner)) {
			dev_err(&interface->dev, "module get failed, exiting\n");
			kfree (serial);
			return -EIO;
		}

		id = usb_match_id(interface, type->id_table);
		retval = type->probe(serial, id);
		module_put(type->driver.owner);

		if (retval) {
			dbg ("sub driver rejected device");
			kfree (serial);
			return retval;
		}
	}

	/* descriptor matches, let's find the endpoints needed */
	/* check out the endpoints */
	iface_desc = interface->cur_altsetting;
	for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
		endpoint = &iface_desc->endpoint[i].desc;
		
		if ((endpoint->bEndpointAddress & 0x80) &&
		    ((endpoint->bmAttributes & 3) == 0x02)) {
			/* we found a bulk in endpoint */
			dbg("found bulk in on endpoint %d", i);
			bulk_in_endpoint[num_bulk_in] = endpoint;
			++num_bulk_in;
		}

		if (((endpoint->bEndpointAddress & 0x80) == 0x00) &&
		    ((endpoint->bmAttributes & 3) == 0x02)) {
			/* we found a bulk out endpoint */
			dbg("found bulk out on endpoint %d", i);
			bulk_out_endpoint[num_bulk_out] = endpoint;
			++num_bulk_out;
		}
		
		if ((endpoint->bEndpointAddress & 0x80) &&
		    ((endpoint->bmAttributes & 3) == 0x03)) {
			/* we found a interrupt in endpoint */
			dbg("found interrupt in on endpoint %d", i);
			interrupt_in_endpoint[num_interrupt_in] = endpoint;
			++num_interrupt_in;
		}

		if (((endpoint->bEndpointAddress & 0x80) == 0x00) &&
		    ((endpoint->bmAttributes & 3) == 0x03)) {
			/* we found an interrupt out endpoint */
			dbg("found interrupt out on endpoint %d", i);