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Basic library structure which supports enumerating detected USB devices
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Daniel Drake 2007-11-28 13:48:45 +00:00
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Daniel Drake <dsd@gentoo.org>

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`config.sub' isn't included in this package, then this package doesn't
need to know the machine type.
If you are _building_ compiler tools for cross-compiling, you should
use the option `--target=TYPE' to select the type of system they will
produce code for.
If you want to _use_ a cross compiler, that generates code for a
platform different from the build platform, you should specify the
"host" platform (i.e., that on which the generated programs will
eventually be run) with `--host=TYPE'.
Sharing Defaults
================
If you want to set default values for `configure' scripts to share, you
can create a site shell script called `config.site' that gives default
values for variables like `CC', `cache_file', and `prefix'.
`configure' looks for `PREFIX/share/config.site' if it exists, then
`PREFIX/etc/config.site' if it exists. Or, you can set the
`CONFIG_SITE' environment variable to the location of the site script.
A warning: not all `configure' scripts look for a site script.
Defining Variables
==================
Variables not defined in a site shell script can be set in the
environment passed to `configure'. However, some packages may run
configure again during the build, and the customized values of these
variables may be lost. In order to avoid this problem, you should set
them in the `configure' command line, using `VAR=value'. For example:
./configure CC=/usr/local2/bin/gcc
causes the specified `gcc' to be used as the C compiler (unless it is
overridden in the site shell script).
Unfortunately, this technique does not work for `CONFIG_SHELL' due to
an Autoconf bug. Until the bug is fixed you can use this workaround:
CONFIG_SHELL=/bin/bash /bin/bash ./configure CONFIG_SHELL=/bin/bash
`configure' Invocation
======================
`configure' recognizes the following options to control how it operates.
`--help'
`-h'
Print a summary of the options to `configure', and exit.
`--version'
`-V'
Print the version of Autoconf used to generate the `configure'
script, and exit.
`--cache-file=FILE'
Enable the cache: use and save the results of the tests in FILE,
traditionally `config.cache'. FILE defaults to `/dev/null' to
disable caching.
`--config-cache'
`-C'
Alias for `--cache-file=config.cache'.
`--quiet'
`--silent'
`-q'
Do not print messages saying which checks are being made. To
suppress all normal output, redirect it to `/dev/null' (any error
messages will still be shown).
`--srcdir=DIR'
Look for the package's source code in directory DIR. Usually
`configure' can determine that directory automatically.
`configure' also accepts some other, not widely useful, options. Run
`configure --help' for more details.

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AUTOMAKE_OPTIONS = dist-bzip2
DISTCLEANFILES = ChangeLog fpusb.pc
EXTRA_DIST = TODO
SUBDIRS = libfpusb
if BUILD_EXAMPLES
SUBDIRS += examples
endif
pkgconfigdir=$(libdir)/pkgconfig
pkgconfig_DATA=fpusb.pc
.PHONY: ChangeLog dist-up
ChangeLog:
git --git-dir $(top_srcdir)/.git log > ChangeLog || touch ChangeLog
dist-hook: ChangeLog
dist-up: dist
ncftpput upload.sourceforge.net incoming $(distdir).tar.bz2

3
NEWS Normal file
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@ -0,0 +1,3 @@
This file lists notable changes in each release. For the full history of all
changes, see ChangeLog.

17
README Normal file
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@ -0,0 +1,17 @@
fpusb
=====
fpusb is another library for USB device access from Linux userspace.
It is written in C and licensed under the LGPL-2.1 (see COPYING).
See the homepage for more information:
http://www.reactivated.net/fprint/wiki/Fpusb
Use the mailing list for questions, comments, etc:
http://www.reactivated.net/fprint/wiki/Mailing_list
Use the bug tracker for bugs and feature requests:
http://www.reactivated.net/fprint/bugs/index.php?project=4&switch=1&do=index
- Daniel Drake <dsd@gentoo.org>

6
TODO Normal file
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@ -0,0 +1,6 @@
isochronous endpoint I/O
optional timerfd support (runtime detection)
API docs
notifications of hotplugged/unplugged devices
thread safety
signalfd emulation through pipes and sigaction() for older kernels

8
autogen.sh Executable file
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@ -0,0 +1,8 @@
#!/bin/sh
libtoolize --copy --force || exit 1
aclocal || exit 1
autoheader || exit 1
autoconf || exit 1
automake -a -c || exit 1
./configure --enable-maintainer-mode --enable-debug-log \
--enable-examples-build $*

49
configure.ac Normal file
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AC_INIT([fpusb], [0.0])
AM_INIT_AUTOMAKE
AC_CONFIG_SRCDIR([libfpusb/core.c])
AM_CONFIG_HEADER([config.h])
AC_PREREQ([2.50])
AC_PROG_CC
AC_PROG_LIBTOOL
AC_C_INLINE
AM_PROG_CC_C_O
# Library versioning
lt_major="0"
lt_revision="0"
lt_age="0"
AC_SUBST(lt_major)
AC_SUBST(lt_revision)
AC_SUBST(lt_age)
# Message logging
AC_ARG_ENABLE([log], [AS_HELP_STRING([--disable-log], [disable all logging])],
[log_enabled=$enableval],
[log_enabled='yes'])
if test "x$log_enabled" != "xno"; then
AC_DEFINE([ENABLE_LOGGING], 1, [Message logging])
fi
AC_ARG_ENABLE([debug-log], [AS_HELP_STRING([--enable-debug-log],
[enable debug logging (default n)])],
[debug_log_enabled=$enableval],
[debug_log_enabled='no'])
if test "x$debug_log_enabled" != "xno"; then
AC_DEFINE([ENABLE_DEBUG_LOGGING], 1, [Debug message logging])
fi
# Examples build
AC_ARG_ENABLE([examples-build], [AS_HELP_STRING([--enable-examples-build],
[build example applications (default n)])],
[build_examples=$enableval],
[build_examples='no'])
AM_CONDITIONAL([BUILD_EXAMPLES], [test "x$build_examples" != "xno"])
AC_DEFINE([API_EXPORTED], [__attribute__((visibility("default")))], [Default visibility])
AM_CFLAGS="-Werror-implicit-function-declaration -Wimplicit-int -Wunreachable-code -Wunused-function -Wunused-label -Wunused-value -Wunused-variable -Wnonnull -Wreturn-type -Wextra -Wshadow"
AC_SUBST(AM_CFLAGS)
AC_CONFIG_FILES([fpusb.pc] [Makefile] [libfpusb/Makefile] [examples/Makefile])
AC_OUTPUT

9
examples/Makefile.am Normal file
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INCLUDES = -I$(top_srcdir)
noinst_PROGRAMS = lsusb dpfp
lsusb_SOURCES = lsusb.c
lsusb_LDADD = ../libfpusb/libfpusb.la -lfpusb
dpfp_SOURCES = dpfp.c
dpfp_LDADD = ../libfpusb/libfpusb.la -lfpusb

556
examples/dpfp.c Normal file
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/*
* fpusb example program to manipulate U.are.U 4000B fingerprint scanner.
* Copyright (C) 2007 Daniel Drake <dsd@gentoo.org>
*
* Basic image capture program only, does not consider the powerup quirks or
* the fact that image encryption may be enabled. Not expected to work
* flawlessly all of the time.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <signal.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <libfpusb/fpusb.h>
#define EP_INTR (1 | USB_ENDPOINT_IN)
#define EP_DATA (2 | USB_ENDPOINT_IN)
#define CTRL_IN (USB_TYPE_VENDOR | USB_ENDPOINT_IN)
#define CTRL_OUT (USB_TYPE_VENDOR | USB_ENDPOINT_OUT)
#define USB_RQ 0x04
#define INTR_LENGTH 64
enum {
MODE_INIT = 0x00,
MODE_AWAIT_FINGER_ON = 0x10,
MODE_AWAIT_FINGER_OFF = 0x12,
MODE_CAPTURE = 0x20,
MODE_SHUT_UP = 0x30,
MODE_READY = 0x80,
};
static int next_state(void);
static int submit_irq_urb(void);
static int submit_img_urb(void);
enum {
STATE_AWAIT_MODE_CHANGE_AWAIT_FINGER_ON = 1,
STATE_AWAIT_IRQ_FINGER_DETECTED,
STATE_AWAIT_MODE_CHANGE_CAPTURE,
STATE_AWAIT_IMAGE,
STATE_AWAIT_MODE_CHANGE_AWAIT_FINGER_OFF,
STATE_AWAIT_IRQ_FINGER_REMOVED,
};
static int state = 0;
static struct fpusb_dev_handle *devh = NULL;
static unsigned char imgbuf[0x1b340];
static unsigned char irqbuf[INTR_LENGTH];
static fpusb_urb_handle *img_urbh = NULL;
static fpusb_urb_handle *irq_urbh = NULL;
static int img_idx = 0;
static int do_exit = 0;
static struct fpusb_bulk_msg imgmsg = {
.endpoint = EP_DATA,
.data = imgbuf,
.length = sizeof(imgbuf),
};
static struct fpusb_bulk_msg irqmsg = {
.endpoint = EP_INTR,
.data = irqbuf,
.length = sizeof(irqbuf),
};
static struct fpusb_dev *find_dpfp_device(void)
{
struct fpusb_dev *dev;
fpusb_find_devices();
for (dev = fpusb_get_devices(); dev; dev = fpusb_dev_next(dev)) {
struct usb_dev_descriptor *desc = fpusb_dev_get_descriptor(dev);
if (desc->idVendor == 0x05ba && desc->idProduct == 0x000a)
return dev;
}
return NULL;
}
static int print_f0_data(void)
{
unsigned char data[0x10];
struct fpusb_ctrl_msg msg = {
.requesttype = CTRL_IN,
.request = USB_RQ,
.value = 0xf0,
.index = 0,
.length = sizeof(data),
.data = data,
};
int r;
unsigned int i;
r = fpusb_ctrl_msg(devh, &msg, 0);
if (r < 0) {
fprintf(stderr, "F0 error %d\n", r);
return r;
}
if ((unsigned int) r < sizeof(data)) {
fprintf(stderr, "short read (%d)\n", r);
return -1;
}
printf("F0 data:");
for (i = 0; i < sizeof(data); i++)
printf("%02x ", data[i]);
printf("\n");
return 0;
}
static int get_hwstat(unsigned char *status)
{
struct fpusb_ctrl_msg msg = {
.requesttype = CTRL_IN,
.request = USB_RQ,
.value = 0x07,
.index = 0,
.length = 1,
.data = status,
};
int r;
r = fpusb_ctrl_msg(devh, &msg, 0);
if (r < 0) {
fprintf(stderr, "read hwstat error %d\n", r);
return r;
}
if ((unsigned int) r < 1) {
fprintf(stderr, "short read (%d)\n", r);
return -1;
}
printf("hwstat reads %02x\n", *status);
return 0;
}
static int set_hwstat(unsigned char data)
{
int r;
struct fpusb_ctrl_msg msg = {
.requesttype = CTRL_OUT,
.request = USB_RQ,
.value = 0x07,
.index = 0,
.length = 1,
.data = &data,
};
printf("set hwstat to %02x\n", data);
r = fpusb_ctrl_msg(devh, &msg, 0);
if (r < 0) {
fprintf(stderr, "set hwstat error %d\n", r);
return r;
}
if ((unsigned int) r < 1) {
fprintf(stderr, "short write (%d)", r);
return -1;
}
return 0;
}
static int set_mode(unsigned char data)
{
int r;
struct fpusb_ctrl_msg msg = {
.requesttype = CTRL_OUT,
.request = USB_RQ,
.value = 0x4e,
.index = 0,
.length = 1,
.data = &data,
};
printf("set mode %02x\n", data);
r = fpusb_ctrl_msg(devh, &msg, 0);
if (r < 0) {
fprintf(stderr, "set mode error %d\n", r);
return r;
}
if ((unsigned int) r < 1) {
fprintf(stderr, "short write (%d)", r);
return -1;
}
return 0;
}
static void cb_mode_changed(struct fpusb_dev_handle *_devh,
struct fpusb_urb_handle *urbh, struct fpusb_ctrl_msg *msg,
enum fp_urb_cb_status status, unsigned char *data, int actual_length,
void *user_data)
{
if (status != FP_URB_COMPLETED) {
fprintf(stderr, "mode change URB not completed!\n");
do_exit = 2;
}
printf("async cb_mode_changed\n");
if (next_state() < 0)
do_exit = 2;
}
static int set_mode_async(unsigned char data)
{
fpusb_urb_handle *urbh;
struct fpusb_ctrl_msg msg = {
.requesttype = CTRL_OUT,
.request = USB_RQ,
.value = 0x4e,
.index = 0,
.length = 1,
.data = &data,
};
printf("async set mode %02x\n", data);
urbh = fpusb_submit_ctrl_msg(devh, &msg, cb_mode_changed, NULL, 1000);
if (!urbh) {
fprintf(stderr, "set mode submit error\n");
return -1;
}
return 0;
}
static int do_sync_intr(unsigned char *data)
{
struct fpusb_bulk_msg msg = {
.endpoint = EP_INTR,
.data = data,
.length = INTR_LENGTH,
};
int r;
int transferred;
r = fpusb_intr_msg(devh, &msg, &transferred, 1000);
if (r < 0) {
fprintf(stderr, "intr error %d\n", r);
return r;
}
if (transferred < INTR_LENGTH) {
fprintf(stderr, "short read (%d)\n", r);
return -1;
}
printf("recv interrupt %04x\n", *((uint16_t *) data));
return 0;
}
static int sync_intr(unsigned char type)
{
int r;
unsigned char data[INTR_LENGTH];
while (1) {
r = do_sync_intr(data);
if (r < 0)
return r;
if (data[0] == type)
return 0;
}
}
static int save_to_file(unsigned char *data)
{
FILE *fd;
char filename[64];
sprintf(filename, "finger%d.pgm", img_idx++);
fd = fopen(filename, "w");
if (!fd)
return -1;
fputs("P5 384 289 255 ", fd);
fwrite(data + 64, 1, 384*289, fd);
fclose(fd);
printf("saved image to %s\n", filename);
return 0;
}
static int next_state(void)
{
int r = 0;
printf("old state: %d\n", state);
switch (state) {
case STATE_AWAIT_IRQ_FINGER_REMOVED:
state = STATE_AWAIT_MODE_CHANGE_AWAIT_FINGER_ON;
r = set_mode_async(MODE_AWAIT_FINGER_ON);
break;
case STATE_AWAIT_MODE_CHANGE_AWAIT_FINGER_ON:
state = STATE_AWAIT_IRQ_FINGER_DETECTED;
break;
case STATE_AWAIT_IRQ_FINGER_DETECTED:
state = STATE_AWAIT_MODE_CHANGE_CAPTURE;
r = set_mode_async(MODE_CAPTURE);
break;
case STATE_AWAIT_MODE_CHANGE_CAPTURE:
state = STATE_AWAIT_IMAGE;
break;
case STATE_AWAIT_IMAGE:
state = STATE_AWAIT_MODE_CHANGE_AWAIT_FINGER_OFF;
r = set_mode_async(MODE_AWAIT_FINGER_OFF);
break;
case STATE_AWAIT_MODE_CHANGE_AWAIT_FINGER_OFF:
state = STATE_AWAIT_IRQ_FINGER_REMOVED;
break;
default:
printf("unrecognised state %d\n", state);
}
if (r < 0) {
fprintf(stderr, "error detected changing state");
return r;
}
printf("new state: %d\n", state);
return 0;
}
static void cb_irq(fpusb_dev_handle *_devh, fpusb_urb_handle *urbh,
struct fpusb_bulk_msg *msg, enum fp_urb_cb_status status,
int actual_length, void *user_data)
{
unsigned char irqtype = msg->data[0];
if (status != FP_URB_COMPLETED) {
fprintf(stderr, "irq URB status %d?\n", status);
do_exit = 2;
return;
}
printf("IRQ callback %02x\n", irqtype);
switch (state) {
case STATE_AWAIT_IRQ_FINGER_DETECTED:
if (irqtype == 0x01) {
if (next_state() < 0) {
do_exit = 2;
return;
}
} else {
printf("finger-on-sensor detected in wrong state!\n");
}
break;
case STATE_AWAIT_IRQ_FINGER_REMOVED:
if (irqtype == 0x02) {
if (next_state() < 0) {
do_exit = 2;
return;
}
} else {
printf("finger-on-sensor detected in wrong state!\n");
}
break;
}
if (submit_irq_urb() < 0)
do_exit = 2;
}
static void cb_img(fpusb_dev_handle *_devh, fpusb_urb_handle *urbh,
struct fpusb_bulk_msg *msg, enum fp_urb_cb_status status,
int actual_length, void *user_data)
{
if (status != FP_URB_COMPLETED) {
fprintf(stderr, "img URB status %d?\n", status);
do_exit = 2;
return;
}
printf("Image callback\n");
save_to_file(imgbuf);
if (next_state() < 0) {
do_exit = 2;
return;
}
if (submit_img_urb() < 0)
do_exit = 2;
}
static int submit_irq_urb(void)
{
fpusb_urb_handle_free(irq_urbh);
irq_urbh = fpusb_submit_intr_msg(devh, &irqmsg, cb_irq, NULL, 0);
return irq_urbh != NULL;
}
static int submit_img_urb(void)
{
fpusb_urb_handle_free(img_urbh);
img_urbh = fpusb_submit_bulk_msg(devh, &imgmsg, cb_img, NULL, 0);
return img_urbh != NULL;
}
static int init_capture(void)
{
int r;
r = submit_irq_urb();
if (r < 0)
return r;
r = submit_img_urb();
if (r < 0) {
fpusb_urb_handle_cancel_sync(devh, img_urbh);
return r;
}
/* start state machine */
state = STATE_AWAIT_IRQ_FINGER_REMOVED;
return next_state();
}
static int do_init(void)
{
unsigned char status;
int r;
r = get_hwstat(&status);
if (r < 0)
return r;
if (!(status & 0x80)) {
r = set_hwstat(status | 0x80);
if (r < 0)
return r;
r = get_hwstat(&status);
if (r < 0)
return r;
}
status &= ~0x80;
r = set_hwstat(status);
if (r < 0)
return r;
r = get_hwstat(&status);
if (r < 0)
return r;
r = sync_intr(0x56);
if (r < 0)
return r;
return 0;
}
static void sighandler(int signum)
{
do_exit = 1;
}
int main(void)
{
struct fpusb_dev *dev;
struct sigaction sigact;
int r = 1;
r = fpusb_init(0);
if (r < 0) {
fprintf(stderr, "failed to initialise fpusb\n");
exit(1);
}
dev = find_dpfp_device();
if (!dev) {
fprintf(stderr, "No device found\n");
goto out;
}
printf("found device\n");
devh = fpusb_dev_open(dev);
if (!devh) {
fprintf(stderr, "Could not open device\n");
goto out;
}
printf("opened device\n");
r = fpusb_dev_claim_intf(devh, 0);
if (r < 0) {
fprintf(stderr, "usb_claim_interface error %d %s\n", r, strerror(-r));
goto out;
}
printf("claimed interface\n");
r = print_f0_data();
if (r < 0)
goto out_release;
r = do_init();
if (r < 0)
goto out_deinit;
/* async from here onwards */
r = init_capture();
if (r < 0)
goto out_deinit;
sigact.sa_handler = sighandler;
sigemptyset(&sigact.sa_mask);
sigact.sa_flags = 0;
sigaction(SIGINT, &sigact, NULL);
sigaction(SIGTERM, &sigact, NULL);
sigaction(SIGQUIT, &sigact, NULL);
while (!do_exit) {
r = fpusb_poll();
if (r < 0)
goto out_deinit;
}
printf("shutting down...\n");
r = fpusb_urb_handle_cancel_sync(devh, irq_urbh);
if (r < 0)
goto out_deinit;
r = fpusb_urb_handle_cancel_sync(devh, img_urbh);
if (r < 0)
goto out_deinit;
if (do_exit == 1)
r = 0;
else
r = 1;
out_deinit:
fpusb_urb_handle_free(img_urbh);
fpusb_urb_handle_free(irq_urbh);
set_mode(0);
set_hwstat(0x80);
out_release:
fpusb_dev_release_intf(devh, 0);
out:
fpusb_dev_close(devh);
fpusb_exit();
return r >= 0 ? r : -r;
}

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/*
* fpusb example program to list devices on the bus
* Copyright (C) 2007 Daniel Drake <dsd@gentoo.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdio.h>
#include <libfpusb/fpusb.h>
void print_devs(fpusb_dev *devs)
{
fpusb_dev *dev;
for (dev = devs; dev; dev = fpusb_dev_next(dev)) {
struct usb_dev_descriptor *desc = fpusb_dev_get_descriptor(dev);
printf("%04x:%04x\n", desc->idVendor, desc->idProduct);
}
}
int main(void)
{
fpusb_dev *devs;
fpusb_init(0);
fpusb_find_devices();
devs = fpusb_get_devices();
print_devs(devs);
fpusb_exit();
return 0;
}

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prefix=@prefix@
exec_prefix=@exec_prefix@
libdir=@libdir@
includedir=@includedir@
Name: fpusb
Description: C API for USB device access from Linux userspace
Version: @VERSION@
Libs: -L${libdir} -lfpusb
Cflags: -I${includedir}/fpusb

7
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lib_LTLIBRARIES = libfpusb.la
libfpusb_la_CFLAGS = -fvisibility=hidden $(AM_CFLAGS)
libfpusb_la_SOURCES = signalfd.h fpusbi.h usbfs.h core.c io.c
libfpusb_la_LIBADD = -lrt
pkginclude_HEADERS = fpusb.h

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/*
* Core functions for libfpusb
* Copyright (C) 2007 Daniel Drake <dsd@gentoo.org>
*
* Portions based on libusb-0.1
* Copyright (c) 2001 Johannes Erdfelt <johannes@erdfelt.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <config.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <features.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include "fpusb.h"
#include "fpusbi.h"
static struct list_head usb_devs;
struct list_head open_devs;
static int parse_descriptor(unsigned char *source, char *descriptor, void *dest)
{
unsigned char *sp = source, *dp = dest;
uint16_t w;
uint32_t d;
char *cp;
for (cp = descriptor; *cp; cp++) {
switch (*cp) {
case 'b': /* 8-bit byte */
*dp++ = *sp++;
break;
case 'w': /* 16-bit word, convert from little endian to CPU */
w = (sp[1] << 8) | sp[0]; sp += 2;
dp += ((unsigned long)dp & 1); /* Align to word boundary */
*((uint16_t *)dp) = w; dp += 2;
break;
case 'd': /* 32-bit dword, convert from little endian to CPU */
d = (sp[3] << 24) | (sp[2] << 16) | (sp[1] << 8) | sp[0]; sp += 4;
dp += ((unsigned long)dp & 2); /* Align to dword boundary */
*((uint32_t *)dp) = d; dp += 4;
break;
case 'W': /* 16-bit word, keep CPU endianess */
dp += ((unsigned long)dp & 1); /* Align to word boundary */
memcpy(dp, sp, 2); sp += 2; dp += 2;
break;
case 'D': /* 32-bit dword, keep CPU endianess */
dp += ((unsigned long)dp & 2); /* Align to dword boundary */
memcpy(dp, sp, 4); sp += 4; dp += 4;
break;
}
}
return sp - source;
}
static int scan_device(char *busdir, const char *devnum)
{
char path[PATH_MAX + 1];
unsigned char raw_desc[DEVICE_DESC_LENGTH];
struct fpusb_dev *dev = malloc(sizeof(*dev));
int fd;
int r;
snprintf(path, PATH_MAX, "%s/%s", busdir, devnum);
fp_dbg("%s", path);
fd = open(path, O_RDWR);
if (!fd) {
fp_dbg("open '%s' failed, ret=%d errno=%d", path, fd, errno);
return -1;
}
r = read(fd, raw_desc, DEVICE_DESC_LENGTH);
if (r < 0) {
fp_err("read failed ret=%d errno=%d", r, errno);
return r;
}
/* FIXME: short read handling? */
parse_descriptor(raw_desc, "bbWbbbbWWWbbbb", &dev->desc);
fp_dbg("found device %04x:%04x", dev->desc.idVendor, dev->desc.idProduct);
dev->nodepath = strdup(path);
list_add(&dev->list, &usb_devs);
close(fd);
return 0;
}
static int scan_busdir(const char *busnum)
{
DIR *dir;
char dirpath[PATH_MAX + 1];
struct dirent *entry;
snprintf(dirpath, PATH_MAX, "%s/%s", USBFS_PATH, busnum);
fp_dbg("%s", dirpath);
dir = opendir(dirpath);
if (!dir) {
fp_err("opendir '%s' failed, errno=%d", dirpath, errno);
return -1;
}
while (entry = readdir(dir)) {
if (entry->d_name[0] == '.')
continue;
/* deliberately ignoring errors due to valid unplug race conditions */
scan_device(dirpath, entry->d_name);
}
return 0;
}
API_EXPORTED int fpusb_find_devices(void)
{
DIR *busses;
struct dirent *entry;
fp_dbg("");
busses = opendir(USBFS_PATH);
if (!busses) {
fp_err("opendir busses failed errno=%d", errno);
return -1;
}
while (entry = readdir(busses)) {
if (entry->d_name[0] == '.')
continue;
/* deliberately ignoring errors, valid race conditions exist
* e.g. unplugging of hubs in the middle of this loop*/
scan_busdir(entry->d_name);
}
return 0;
}
API_EXPORTED struct fpusb_dev *fpusb_get_devices(void)
{
if (list_empty(&usb_devs))
return NULL;
return list_entry(usb_devs.next, struct fpusb_dev, list);
}
API_EXPORTED struct fpusb_dev *fpusb_dev_next(struct fpusb_dev *dev)
{
struct list_head *head = &dev->list;
if (!head || head->next == &usb_devs)
return NULL;
return list_entry(head->next, struct fpusb_dev, list);
}
API_EXPORTED struct usb_dev_descriptor *fpusb_dev_get_descriptor(
struct fpusb_dev *dev)
{
return &dev->desc;
}
API_EXPORTED struct fpusb_dev_handle *fpusb_dev_open(struct fpusb_dev *dev)
{
struct fpusb_dev_handle *devh;
int fd;
fp_dbg("open %04x:%04x", dev->desc.idVendor, dev->desc.idProduct);
fd = open(dev->nodepath, O_RDWR);
if (!fd) {
fp_err("open failed, code %d errno %d", fd, errno);
return NULL;
}
devh = malloc(sizeof(*devh));
if (!devh) {
close(fd);
return NULL;
}
devh->fd = fd;
devh->dev = dev;
list_add(&devh->list, &open_devs);
return devh;
}
static void do_close(struct fpusb_dev_handle *devh)
{
close(devh->fd);
}
API_EXPORTED void fpusb_dev_close(struct fpusb_dev_handle *devh)
{
if (!devh)
return;
fp_dbg("");
list_del(&devh->list);
do_close(devh);
free(devh);
}
API_EXPORTED int fpusb_dev_claim_intf(struct fpusb_dev_handle *dev,
int iface)
{
int r;
fp_dbg("interface %d", iface);
r = ioctl(dev->fd, IOCTL_USB_CLAIMINTF, &iface);
if (r < 0)
fp_err("claim interface failed, error %d", r);
return r;
}
API_EXPORTED int fpusb_dev_release_intf(struct fpusb_dev_handle *dev,
int iface)
{
int r;
fp_dbg("interface %d", iface);
r = ioctl(dev->fd, IOCTL_USB_RELEASEINTF, &iface);
if (r < 0)
fp_err("release interface failed, error %d", r);
return r;
}
API_EXPORTED int fpusb_init(int signum)
{
/* FIXME: find correct usb node path */
fp_dbg("");
list_init(&usb_devs);
list_init(&open_devs);
return fpi_io_init(signum);
}
API_EXPORTED void fpusb_exit(void)
{
struct fpusb_dev_handle *devh;
fp_dbg("");
if (!list_empty(&open_devs)) {
fp_dbg("naughty app left some devices open!\n");
list_for_each_entry(devh, &open_devs, list)
do_close(devh);
}
fpi_io_exit();
}
void fpi_log(enum fpi_log_level level, const char *function,
const char *format, ...)
{
va_list args;
FILE *stream = stdout;
const char *prefix;
switch (level) {
case LOG_LEVEL_INFO:
prefix = "info";
break;
case LOG_LEVEL_WARNING:
stream = stderr;
prefix = "warning";
break;
case LOG_LEVEL_ERROR:
stream = stderr;
prefix = "error";
break;
case LOG_LEVEL_DEBUG:
stream = stderr;
prefix = "debug";
break;
default:
stream = stderr;
prefix = "unknown";
break;
}
fprintf(stream, "fpusb:%s [%s] ", prefix, function);
va_start (args, format);
vfprintf(stream, format, args);
va_end (args);
fprintf(stream, "\n");
}

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/*
* Public libfpusb header file
* Copyright (C) 2007 Daniel Drake <dsd@gentoo.org>
*
* Portions based on libusb-0.1
* Copyright (c) 2001 Johannes Erdfelt <johannes@erdfelt.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef __FPUSB_H__
#define __FPUSB_H__
#include <stdint.h>
#include <sys/time.h>
/* standard USB stuff */
/* Device and/or Interface Class codes */
#define USB_CLASS_PER_INTERFACE 0 /* for DeviceClass */
#define USB_CLASS_AUDIO 1
#define USB_CLASS_COMM 2
#define USB_CLASS_HID 3
#define USB_CLASS_PRINTER 7
#define USB_CLASS_PTP 6
#define USB_CLASS_MASS_STORAGE 8
#define USB_CLASS_HUB 9
#define USB_CLASS_DATA 10
#define USB_CLASS_VENDOR_SPEC 0xff
/* Descriptor types */
#define USB_DT_DEVICE 0x01
#define USB_DT_CONFIG 0x02
#define USB_DT_STRING 0x03
#define USB_DT_INTERFACE 0x04
#define USB_DT_ENDPOINT 0x05
#define USB_DT_HID 0x21
#define USB_DT_REPORT 0x22
#define USB_DT_PHYSICAL 0x23
#define USB_DT_HUB 0x29
/* Descriptor sizes per descriptor type */
#define USB_DT_DEVICE_SIZE 18
#define USB_DT_CONFIG_SIZE 9
#define USB_DT_INTERFACE_SIZE 9
#define USB_DT_ENDPOINT_SIZE 7
#define USB_DT_ENDPOINT_AUDIO_SIZE 9 /* Audio extension */
#define USB_DT_HUB_NONVAR_SIZE 7
#define USB_ENDPOINT_ADDRESS_MASK 0x0f /* in bEndpointAddress */
#define USB_ENDPOINT_DIR_MASK 0x80
#define USB_ENDPOINT_IN 0x80
#define USB_ENDPOINT_OUT 0x00
#define USB_ENDPOINT_TYPE_MASK 0x03 /* in bmAttributes */
#define USB_ENDPOINT_TYPE_CONTROL 0
#define USB_ENDPOINT_TYPE_ISOCHRONOUS 1
#define USB_ENDPOINT_TYPE_BULK 2
#define USB_ENDPOINT_TYPE_INTERRUPT 3
/* Standard requests */
#define USB_REQ_GET_STATUS 0x00
#define USB_REQ_CLEAR_FEATURE 0x01
/* 0x02 is reserved */
#define USB_REQ_SET_FEATURE 0x03
/* 0x04 is reserved */
#define USB_REQ_SET_ADDRESS 0x05
#define USB_REQ_GET_DESCRIPTOR 0x06
#define USB_REQ_SET_DESCRIPTOR 0x07
#define USB_REQ_GET_CONFIGURATION 0x08
#define USB_REQ_SET_CONFIGURATION 0x09
#define USB_REQ_GET_INTERFACE 0x0A
#define USB_REQ_SET_INTERFACE 0x0B
#define USB_REQ_SYNCH_FRAME 0x0C
#define USB_TYPE_STANDARD (0x00 << 5)
#define USB_TYPE_CLASS (0x01 << 5)
#define USB_TYPE_VENDOR (0x02 << 5)
#define USB_TYPE_RESERVED (0x03 << 5)
#define USB_RECIP_DEVICE 0x00
#define USB_RECIP_INTERFACE 0x01
#define USB_RECIP_ENDPOINT 0x02
#define USB_RECIP_OTHER 0x03
struct usb_dev_descriptor {
uint8_t bLength;
uint8_t bDescriptorType;
uint16_t bcdUSB;
uint8_t bDeviceClass;
uint8_t bDeviceSubClass;
uint8_t bDeviceProtocol;
uint8_t bMaxPacketSize0;
uint16_t idVendor;
uint16_t idProduct;
uint16_t bcdDevice;
uint8_t iManufacturer;
uint8_t iProduct;
uint8_t iSerialNumber;
uint8_t bNumConfigurations;
};
/* fpusb */
struct fpusb_dev;
typedef struct fpusb_dev fpusb_dev;
struct fpusb_dev_handle;
typedef struct fpusb_dev_handle fpusb_dev_handle;
struct fpusb_urb_handle;
typedef struct fpusb_urb_handle fpusb_urb_handle;
enum fp_urb_cb_status {
FP_URB_SILENT_COMPLETION = 0,
FP_URB_COMPLETED,
FP_URB_TIMEOUT,
FP_URB_CANCELLED,
};
struct fpusb_ctrl_msg {
uint8_t requesttype;
uint8_t request;
uint16_t value;
uint16_t index;
uint16_t length;
unsigned char *data;
};
typedef void (*fpusb_ctrl_cb_fn)(fpusb_dev_handle *devh, fpusb_urb_handle *urbh,
struct fpusb_ctrl_msg *msg, enum fp_urb_cb_status status,
unsigned char *data, int actual_length, void *user_data);
struct fpusb_bulk_msg {
unsigned char endpoint;
unsigned char *data;
int length;
};
typedef void (*fpusb_bulk_cb_fn)(fpusb_dev_handle *devh, fpusb_urb_handle *urbh,
struct fpusb_bulk_msg *msg, enum fp_urb_cb_status status,
int actual_length, void *user_data);
int fpusb_init(int signum);
void fpusb_exit(void);
int fpusb_find_devices(void);
fpusb_dev *fpusb_get_devices(void);
struct usb_dev_descriptor *fpusb_dev_get_descriptor(fpusb_dev *dev);
fpusb_dev *fpusb_dev_next(fpusb_dev *dev);
fpusb_dev_handle *fpusb_dev_open(fpusb_dev *dev);
void fpusb_dev_close(fpusb_dev_handle *devh);
int fpusb_dev_claim_intf(fpusb_dev_handle *dev, int iface);
int fpusb_dev_release_intf(fpusb_dev_handle *dev, int iface);
/* async I/O */
fpusb_urb_handle *fpusb_submit_ctrl_msg(fpusb_dev_handle *devh,
struct fpusb_ctrl_msg *msg, fpusb_ctrl_cb_fn callback, void *user_data,
unsigned int timeout);
fpusb_urb_handle *fpusb_submit_bulk_msg(fpusb_dev_handle *devh,
struct fpusb_bulk_msg *msg, fpusb_bulk_cb_fn callback, void *user_data,
unsigned int timeout);
fpusb_urb_handle *fpusb_submit_intr_msg(fpusb_dev_handle *devh,
struct fpusb_bulk_msg *msg, fpusb_bulk_cb_fn callback, void *user_data,
unsigned int timeout);
int fpusb_urb_handle_cancel(fpusb_dev_handle *devh, fpusb_urb_handle *urbh);
int fpusb_urb_handle_cancel_sync(fpusb_dev_handle *devh,
fpusb_urb_handle *urbh);
void fpusb_urb_handle_free(fpusb_urb_handle *urbh);
int fpusb_poll_timeout(struct timeval *tv);
int fpusb_poll(void);
/* sync I/O */
int fpusb_ctrl_msg(fpusb_dev_handle *devh, struct fpusb_ctrl_msg *msg,
unsigned int timeout);
int fpusb_bulk_msg(fpusb_dev_handle *devh, struct fpusb_bulk_msg *msg,
int *transferred, unsigned int timeout);
int fpusb_intr_msg(fpusb_dev_handle *devh, struct fpusb_bulk_msg *msg,
int *transferred, unsigned int timeout);
#endif

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/*
* Internal header for libfpusb
* Copyright (C) 2007 Daniel Drake <dsd@gentoo.org>
*
* Portions based on libusb-0.1
* Copyright (c) 2001 Johannes Erdfelt <johannes@erdfelt.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef __FPUSBI_H__
#define __FPUSBI_H__
#include <config.h>
#include <endian.h>
#include <stddef.h>
#include <sys/ioctl.h>
#include <time.h>
#include <fpusb.h>
#include <usbfs.h>
#define USBFS_PATH "/dev/bus/usb"
#define DEVICE_DESC_LENGTH 18
struct list_head {
struct list_head *prev, *next;
};
/* Get an entry from the list
* ptr - the address of this list_head element in "type"
* type - the data type that contains "member"
* member - the list_head element in "type"
*/
#define list_entry(ptr, type, member) \
((type *)((char *)(ptr) - (unsigned long)(&((type *)0L)->member)))
/* Get each entry from a list
* pos - A structure pointer has a "member" element
* head - list head
* member - the list_head element in "pos"
*/
#define list_for_each_entry(pos, head, member) \
for (pos = list_entry((head)->next, typeof(*pos), member); \
&pos->member != (head); \
pos = list_entry(pos->member.next, typeof(*pos), member))
#define list_for_each_entry_safe(pos, n, head, member) \
for (pos = list_entry((head)->next, typeof(*pos), member), \
n = list_entry(pos->member.next, typeof(*pos), member); \
&pos->member != (head); \
pos = n, n = list_entry(n->member.next, typeof(*n), member))
#define list_empty(entry) ((entry)->next == (entry))
static inline void list_init(struct list_head *entry)
{
entry->prev = entry->next = entry;
}
static inline void list_add(struct list_head *entry, struct list_head *head)
{
entry->next = head->next;
entry->prev = head;
head->next->prev = entry;
head->next = entry;
}
static inline void list_add_tail(struct list_head *entry,
struct list_head *head)
{
entry->next = head;
entry->prev = head->prev;
head->prev->next = entry;
head->prev = entry;
}
static inline void list_del(struct list_head *entry)
{
entry->next->prev = entry->prev;
entry->prev->next = entry->next;
}
#define container_of(ptr, type, member) ({ \
const typeof( ((type *)0)->member ) *__mptr = (ptr); \
(type *)( (char *)__mptr - offsetof(type,member) );})
#define bswap16(x) (((x & 0xff) << 8) | (x >> 8))
#if __BYTE_ORDER == __LITTLE_ENDIAN
#define cpu_to_le16(x) (x)
#define le16_to_cpu(x) (x)
#elif __BYTE_ORDER == __BIG_ENDIAN
#define le16_to_cpu(x) bswap16(x)
#define cpu_to_le16(x) bswap16(x)
#else
#error "Unrecognized endianness"
#endif
#define MIN(a, b) ((a) < (b) ? (a) : (b))
#define MAX(a, b) ((a) > (b) ? (a) : (b))
#define TIMESPEC_IS_SET(ts) ((ts)->tv_sec != 0 || (ts)->tv_nsec != 0)
enum fpi_log_level {
LOG_LEVEL_DEBUG,
LOG_LEVEL_INFO,
LOG_LEVEL_WARNING,
LOG_LEVEL_ERROR,
};
void fpi_log(enum fpi_log_level, const char *function, const char *format, ...);
#ifdef ENABLE_LOGGING
#define _fpi_log(level, fmt...) fpi_log(level, __FUNCTION__, fmt)
#else
#define _fpi_log(level, fmt...)
#endif
#ifdef ENABLE_DEBUG_LOGGING
#define fp_dbg(fmt...) _fpi_log(LOG_LEVEL_DEBUG, fmt)
#else
#define fp_dbg(fmt...)
#endif
#define fp_info(fmt...) _fpi_log(LOG_LEVEL_INFO, fmt)
#define fp_warn(fmt...) _fpi_log(LOG_LEVEL_WARNING, fmt)
#define fp_err(fmt...) _fpi_log(LOG_LEVEL_ERROR, fmt)
struct fpusb_dev {
struct list_head list;
char *nodepath;
struct usb_dev_descriptor desc;
};
struct fpusb_dev_handle {
struct list_head list;
struct fpusb_dev *dev;
int fd;
};
enum fpusb_urb_type {
FPUSB_URB_CONTROL,
FPUSB_URB_BULK,
};
#define FPUSB_URBH_DATA_BELONGS_TO_USER (1<<0)
#define FPUSB_URBH_SYNC_CANCELLED (1<<1)
#define FPUSB_URBH_TIMED_OUT (1<<2)
struct fpusb_urb_handle {
struct fpusb_dev_handle *devh;
struct usb_urb urb;
struct list_head list;
struct timespec timeout;
timer_t timer;
unsigned char urb_type;
unsigned char endpoint;
void *msg;
int transfer_len;
int transferred;
unsigned char *buffer;
void *callback;
void *user_data;
uint8_t flags;
};
/* bus structures */
struct usb_ctrl_setup {
uint8_t bRequestType;
uint8_t bRequest;
uint16_t wValue;
uint16_t wIndex;
uint16_t wLength;
} __attribute__((packed));
/* shared data and functions */
extern struct list_head open_devs;
int fpi_io_init(int _signum);
void fpi_io_exit(void);
#endif

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/*
* I/O functions for libfpusb
* Copyright (C) 2007 Daniel Drake <dsd@gentoo.org>
*
* Portions based on libusb-0.1
* Copyright (c) 2001 Johannes Erdfelt <johannes@erdfelt.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <config.h>
#include <errno.h>
#include <signal.h>
#include <stdint.h>
#include <string.h>
#include <stdlib.h>
#include <sys/select.h>
#include <sys/time.h>
#include <time.h>
#include <unistd.h>
/* signalfd() support is present in glibc-2.7 onwards, but glibc-2.7 contains
* a bug where the header is neither installed or compilable. This will be
* fixed for glibc-2.8. */
#if __GLIBC_PREREQ(2, 8)
#include <sys/signalfd.h>
#else
#include "signalfd.h"
#endif
#include "fpusbi.h"
static int sigfd;
static int signum;
/* this is a list of in-flight fp_urb_handles, sorted by timeout expiration.
* URBs to timeout the soonest are placed at the beginning of the list, URBs
* that will time out later are placed after, and urbs with infinite timeout
* are always placed at the very end. */
static struct list_head flying_urbs;
static int setup_signalfd(int _signum)
{
sigset_t sigset;
if (_signum == 0)
_signum = SIGRTMIN;
fp_dbg("signal %d", _signum);
sigemptyset(&sigset);
sigaddset(&sigset, _signum);
sigfd = signalfd(-1, &sigset, 0);
if (sigfd < 0) {
fp_err("signalfd failed, code=%d errno=%d", sigfd, errno);
return sigfd;
}
fp_dbg("got signalfd %d", sigfd);
signum = _signum;
sigemptyset(&sigset);
sigaddset(&sigset, _signum);
return sigprocmask(SIG_BLOCK, &sigset, NULL);
}
int fpi_io_init(int _signum)
{
list_init(&flying_urbs);
return setup_signalfd(signum);
}
void fpi_io_exit(void)
{
close(sigfd);
}
static int calculate_timeout(struct fpusb_urb_handle *urbh,
unsigned int timeout)
{
int r;
struct timespec current_time;
struct sigevent sigevt = {
.sigev_notify = SIGEV_SIGNAL,
.sigev_signo = signum,
};
struct itimerspec itspec;
struct timespec *it_value = &itspec.it_value;
if (!timeout)
return 0;
r = clock_gettime(CLOCK_MONOTONIC, &current_time);
if (r < 0) {
fp_err("failed to read monotonic clock, errno=%d", errno);
return r;
}
r = timer_create(CLOCK_MONOTONIC, &sigevt, &urbh->timer);
if (r < 0) {
fp_err("failed to create monotonic timer");
return r;
}
memset(&itspec, 0, sizeof(itspec));
it_value->tv_sec = current_time.tv_sec + (timeout / 1000);
it_value->tv_nsec = current_time.tv_nsec +
((timeout % 1000) * 1000000);
if (it_value->tv_nsec > 1000000000) {
it_value->tv_nsec -= 1000000000;
it_value->tv_sec++;
}
r = timer_settime(&urbh->timer, TIMER_ABSTIME, &itspec, NULL);
if (r < 0) {
fp_err("failed to arm monotonic timer");
return r;
}
urbh->timeout = itspec.it_value;
return 0;
}
static void add_to_flying_list(struct fpusb_urb_handle *urbh)
{
struct fpusb_urb_handle *cur;
struct timespec *timeout = &urbh->timeout;
/* if we have no other flying urbs, start the list with this one */
if (list_empty(&flying_urbs)) {
list_add(&urbh->list, &flying_urbs);
return;
}
/* if we have infinite timeout, append to end of list */
if (!TIMESPEC_IS_SET(timeout)) {
list_add_tail(&urbh->list, &flying_urbs);
return;
}
/* otherwise, find appropriate place in list */
list_for_each_entry(cur, &flying_urbs, list) {
/* find first timeout that occurs after the urbh in question */
struct timespec *cur_ts = &cur->timeout;
if (!TIMESPEC_IS_SET(cur_ts) || (cur_ts->tv_sec > timeout->tv_sec) ||
(cur_ts->tv_sec == timeout->tv_sec &&
cur_ts->tv_nsec > timeout->tv_nsec)) {
list_add_tail(&urbh->list, &cur->list);
return;
}
}
/* otherwise we need to be inserted at the end */
list_add_tail(&urbh->list, &flying_urbs);
}
static int submit_urb(struct fpusb_dev_handle *devh,
struct fpusb_urb_handle *urbh)
{
int r;
struct usb_urb *urb = &urbh->urb;
int to_be_transferred = urbh->transfer_len - urbh->transferred;
urb->type = urbh->urb_type;
urb->endpoint = urbh->endpoint;
urb->buffer = urbh->buffer + urbh->transferred;
urb->buffer_length = MIN(to_be_transferred, MAX_URB_BUFFER_LENGTH);
urb->signr = signum;
/* FIXME: for requests that we have to split into multiple URBs, we should
* submit all the URBs instantly: submit, submit, submit, reap, reap, reap
* rather than: submit, reap, submit, reap, submit, reap
* this will improve performance and fix bugs concerning behaviour when
* the user submits two similar multiple-urb requests */
fp_dbg("transferring %d from %d bytes", urb->buffer_length,
to_be_transferred);
r = ioctl(devh->fd, IOCTL_USB_SUBMITURB, &urbh->urb);
if (r < 0) {
fp_err("submiturb failed error %d errno=%d", r, errno);
return r;
}
add_to_flying_list(urbh);
return 0;
}
API_EXPORTED struct fpusb_urb_handle *fpusb_submit_ctrl_msg(
struct fpusb_dev_handle *devh, struct fpusb_ctrl_msg *msg,
fpusb_ctrl_cb_fn callback, void *user_data, unsigned int timeout)
{
struct fpusb_urb_handle *urbh = malloc(sizeof(*urbh));
struct usb_ctrl_setup *setup;
unsigned char *urbdata;
int urbdata_length = sizeof(struct usb_ctrl_setup) + msg->length;
int r;
if (!urbh)
return NULL;
memset(urbh, 0, sizeof(*urbh));
urbh->devh = devh;
urbh->callback = callback;
urbh->user_data = user_data;
r = calculate_timeout(urbh, timeout);
if (r < 0) {
free(urbh);
return NULL;
}
urbdata = malloc(urbdata_length);
if (!urbdata) {
free(urbh);
return NULL;
}
fp_dbg("RQT=%02x RQ=%02x VAL=%04x IDX=%04x length=%d",
msg->requesttype, msg->request, msg->value, msg->index, msg->length);
setup = (struct usb_ctrl_setup *) urbdata;
setup->bRequestType = msg->requesttype;
setup->bRequest = msg->request;
setup->wValue = cpu_to_le16(msg->value);
setup->wIndex = cpu_to_le16(msg->index);
setup->wLength = cpu_to_le16(msg->length);
if ((msg->requesttype & 0x80) == USB_ENDPOINT_OUT)
memcpy(urbdata + sizeof(struct usb_ctrl_setup), msg->data, msg->length);
urbh->urb_type = USB_URB_TYPE_CONTROL;
urbh->msg = msg;
urbh->buffer = urbdata;
urbh->transfer_len = urbdata_length;
r = submit_urb(devh, urbh);
if (r < 0) {
free(urbh);
free(urbdata);
return NULL;
}
return urbh;
}
static struct fpusb_urb_handle *submit_bulk_msg(struct fpusb_dev_handle *devh,
struct fpusb_bulk_msg *msg, fpusb_bulk_cb_fn callback, void *user_data,
unsigned int timeout, unsigned char urbtype)
{
struct fpusb_urb_handle *urbh = malloc(sizeof(*urbh));
int r;
fp_dbg("length %d timeout %d", msg->length, timeout);
if (!urbh)
return NULL;
memset(urbh, 0, sizeof(*urbh));
r = calculate_timeout(urbh, timeout);
if (r < 0) {
free(urbh);
return NULL;
}
urbh->devh = devh;
urbh->callback = callback;
urbh->user_data = user_data;
urbh->flags |= FPUSB_URBH_DATA_BELONGS_TO_USER;
urbh->msg = msg;
urbh->endpoint = msg->endpoint;
urbh->urb_type = urbtype;
urbh->buffer = msg->data;
urbh->transfer_len = msg->length;
r = submit_urb(devh, urbh);
if (r < 0) {
free(urbh);
return NULL;
}
return urbh;
}
API_EXPORTED struct fpusb_urb_handle *fpusb_submit_bulk_msg(
struct fpusb_dev_handle *devh, struct fpusb_bulk_msg *msg,
fpusb_bulk_cb_fn callback, void *user_data, unsigned int timeout)
{
return submit_bulk_msg(devh, msg, callback, user_data, timeout,
USB_URB_TYPE_BULK);
}
API_EXPORTED struct fpusb_urb_handle *fpusb_submit_intr_msg(
struct fpusb_dev_handle *devh, struct fpusb_bulk_msg *msg,
fpusb_bulk_cb_fn callback, void *user_data, unsigned int timeout)
{
return submit_bulk_msg(devh, msg, callback, user_data, timeout,
USB_URB_TYPE_INTERRUPT);
}
API_EXPORTED int fpusb_urb_handle_cancel(struct fpusb_dev_handle *devh,
struct fpusb_urb_handle *urbh)
{
int r;
fp_dbg("");
r = ioctl(devh->fd, IOCTL_USB_DISCARDURB, &urbh->urb);
if (r < 0)
fp_err("cancel urb failed error %d", r);
return r;
}
API_EXPORTED int fpusb_urb_handle_cancel_sync(struct fpusb_dev_handle *devh,
struct fpusb_urb_handle *urbh)
{
int r;
fp_dbg("");
r = ioctl(devh->fd, IOCTL_USB_DISCARDURB, &urbh->urb);
if (r < 0) {
fp_err("cancel urb failed error %d", r);
return r;
}
urbh->flags |= FPUSB_URBH_SYNC_CANCELLED;
while (urbh->flags & FPUSB_URBH_SYNC_CANCELLED) {
r = fpusb_poll();
if (r < 0)
return r;
}
return 0;
}
int handle_transfer_completion(struct fpusb_dev_handle *devh,
struct fpusb_urb_handle *urbh, enum fp_urb_cb_status status)
{
struct usb_urb *urb = &urbh->urb;
if (TIMESPEC_IS_SET(&urbh->timeout))
timer_delete(urbh->timer);
if (status == FP_URB_SILENT_COMPLETION)
return 0;
if (urb->type == USB_URB_TYPE_CONTROL) {
fpusb_ctrl_cb_fn callback = urbh->callback;
if (callback)
callback(devh, urbh, urbh->msg, status,
urb->buffer + sizeof(struct usb_ctrl_setup), urbh->transferred,
urbh->user_data);
} else if (urb->type == USB_URB_TYPE_BULK ||
urb->type == USB_URB_TYPE_INTERRUPT) {
fpusb_bulk_cb_fn callback = urbh->callback;
if (callback)
callback(devh, urbh, urbh->msg, status, urbh->transferred,
urbh->user_data);
}
return 0;
}
static int handle_transfer_cancellation(struct fpusb_dev_handle *devh,
struct fpusb_urb_handle *urbh)
{
/* if the URB is being cancelled synchronously, raise cancellation
* completion event by unsetting flag, and ensure that user callback does
* not get called.
*/
if (urbh->flags & FPUSB_URBH_SYNC_CANCELLED) {
urbh->flags &= ~FPUSB_URBH_SYNC_CANCELLED;
fp_dbg("detected sync. cancel");
return handle_transfer_completion(devh, urbh, FP_URB_SILENT_COMPLETION);
}
/* if the URB was cancelled due to timeout, report timeout to the user */
if (urbh->flags & FPUSB_URBH_TIMED_OUT) {
fp_dbg("detected timeout cancellation");
return handle_transfer_completion(devh, urbh, FP_URB_TIMEOUT);
}
/* otherwise its a normal async cancel */
return handle_transfer_completion(devh, urbh, FP_URB_CANCELLED);
}
static int reap_for_devh(struct fpusb_dev_handle *devh)
{
int r;
struct usb_urb *urb;
struct fpusb_urb_handle *urbh;
int trf_requested;
r = ioctl(devh->fd, IOCTL_USB_REAPURBNDELAY, &urb);
if (r == -1 && errno == EAGAIN)
return r;
if (r < 0) {
fp_err("reap failed error %d errno=%d", r, errno);
return r;
}
urbh = container_of(urb, struct fpusb_urb_handle, urb);
fp_dbg("urb type=%d status=%d transferred=%d", urb->type, urb->status,
urb->actual_length);
list_del(&urbh->list);
if (urb->status == -2)
return handle_transfer_cancellation(devh, urbh);
/* FIXME: research what other status codes may exist */
if (urb->status != 0)
fp_warn("unrecognised urb status %d", urb->status);
/* determine how much data was asked for */
trf_requested = MIN(urbh->transfer_len - urbh->transferred,
MAX_URB_BUFFER_LENGTH);
urbh->transferred += urb->actual_length;
/* if we were provided less data than requested, then our transfer is
* done */
if (urb->actual_length < trf_requested) {
fp_dbg("less data than requested (%d/%d) --> all done",
urb->actual_length, trf_requested);
return handle_transfer_completion(devh, urbh, FP_URB_COMPLETED);
}
/* if we've transferred all data, we're done */
if (urbh->transferred == urbh->transfer_len) {
fp_dbg("transfer complete --> all done");
return handle_transfer_completion(devh, urbh, FP_URB_COMPLETED);
}
/* otherwise, we have more data to transfer */
fp_dbg("more data to transfer...");
memset(urb, 0, sizeof(*urb));
return submit_urb(devh, urbh);
}
static void handle_timeout(struct fpusb_urb_handle *urbh)
{
/* handling timeouts is tricky, as we may race with the kernel: we may
* detect a timeout racing with the condition that the urb has actually
* completed. we asynchronously cancel the URB and report timeout
* to the user when the URB cancellation completes (or not at all if the
* URB actually gets delivered as per this race) */
int r;
urbh->flags |= FPUSB_URBH_TIMED_OUT;
r = fpusb_urb_handle_cancel(urbh->devh, urbh);
if (r < 0)
fp_warn("async cancel failed %d errno=%d", r, errno);
}
static int handle_timeouts(void)
{
struct timespec systime;
struct fpusb_urb_handle *urbh;
int r;
if (list_empty(&flying_urbs))
return 0;
/* get current time */
r = clock_gettime(CLOCK_MONOTONIC, &systime);
if (r < 0)
return r;
/* iterate through flying urbs list, finding all urbs that have expired
* timeouts */
list_for_each_entry(urbh, &flying_urbs, list) {
struct timespec *cur_ts = &urbh->timeout;
/* if we've reached urbs of infinite timeout, we're all done */
if (!TIMESPEC_IS_SET(cur_ts))
return 0;
/* if urb has non-expired timeout, nothing more to do */
if ((cur_ts->tv_sec > systime.tv_sec) ||
(cur_ts->tv_sec == systime.tv_sec &&
cur_ts->tv_nsec > systime.tv_nsec))
return 0;
/* otherwise, we've got an expired timeout to handle */
handle_timeout(urbh);
}
return 0;
}
static int reap(void)
{
struct fpusb_dev_handle *devh;
int r;
list_for_each_entry(devh, &open_devs, list) {
r = reap_for_devh(devh);
if (r == -1 && errno == EAGAIN)
continue;
if (r < 0)
return r;
}
r = handle_timeouts();
return 0;
}
static int flush_sigfd(void)
{
int r;
struct signalfd_siginfo siginfo;
r = read(sigfd, &siginfo, sizeof(siginfo));
if (r < 0) {
fp_err("sigfd read failed %d %d", r, errno);
return r;
}
if ((unsigned int) r < sizeof(siginfo)) {
fp_err("sigfd short read (%d/%d)", r, sizeof(siginfo));
return -1;
}
return 0;
}
static int poll_io(struct timeval *tv)
{
int r;
fd_set fds;
FD_ZERO(&fds);
FD_SET(sigfd, &fds);
r = select(sigfd + 1, &fds, NULL, NULL, tv);
if (r == -1 && errno == EINTR)
return 0;
if (r < 0) {
fp_err("select failed %d err=%d\n", r, errno);
return r;
}
if (r > 0) {
flush_sigfd();
return reap();
}
return 0;
}
API_EXPORTED int fpusb_poll_timeout(struct timeval *tv)
{
return poll_io(tv);
}
API_EXPORTED int fpusb_poll(void)
{
struct timeval tv;
tv.tv_sec = 0;
tv.tv_usec = 500000;
return poll_io(&tv);
}
struct sync_ctrl_handle {
enum fp_urb_cb_status status;
unsigned char *data;
int actual_length;
};
static void ctrl_msg_cb(struct fpusb_dev_handle *devh,
struct fpusb_urb_handle *urbh, struct fpusb_ctrl_msg *msg,
enum fp_urb_cb_status status, unsigned char *data, int actual_length,
void *user_data)
{
struct sync_ctrl_handle *ctrlh = (struct sync_ctrl_handle *) user_data;
fp_dbg("actual_length=%d", actual_length);
if (status == FP_URB_COMPLETED) {
/* copy results into user-defined buffer */
if (msg->requesttype & USB_ENDPOINT_IN)
memcpy(ctrlh->data, data, actual_length);
}
ctrlh->status = status;
ctrlh->actual_length = actual_length;
/* caller frees urbh */
}
API_EXPORTED int fpusb_ctrl_msg(struct fpusb_dev_handle *devh,
struct fpusb_ctrl_msg *msg, unsigned int timeout)
{
struct fpusb_urb_handle *urbh;
struct sync_ctrl_handle ctrlh;
memset(&ctrlh, 0, sizeof(ctrlh));
ctrlh.data = msg->data;
urbh = fpusb_submit_ctrl_msg(devh, msg, ctrl_msg_cb, &ctrlh, timeout);
if (!urbh)
return -1;
while (!ctrlh.status) {
int r = fpusb_poll();
if (r < 0) {
fpusb_urb_handle_cancel_sync(devh, urbh);
fpusb_urb_handle_free(urbh);
return r;
}
}
fpusb_urb_handle_free(urbh);
switch (ctrlh.status) {
case FP_URB_COMPLETED:
return ctrlh.actual_length;
case FP_URB_TIMEOUT:
return -ETIMEDOUT;
default:
fp_warn("unrecognised status code %d", ctrlh.status);
return -1;
}
}
struct sync_bulk_handle {
enum fp_urb_cb_status status;
int actual_length;
};
static void bulk_msg_cb(struct fpusb_dev_handle *devh,
struct fpusb_urb_handle *urbh, struct fpusb_bulk_msg *msg,
enum fp_urb_cb_status status, int actual_length, void *user_data)
{
struct sync_bulk_handle *bulkh = (struct sync_bulk_handle *) user_data;
fp_dbg("");
bulkh->status = status;
bulkh->actual_length = actual_length;
/* caller frees urbh */
}
static int do_sync_bulk_msg(struct fpusb_dev_handle *devh,
struct fpusb_bulk_msg *msg, int *transferred, unsigned int timeout,
unsigned char urbtype)
{
struct fpusb_urb_handle *urbh;
struct sync_bulk_handle bulkh;
memset(&bulkh, 0, sizeof(bulkh));
urbh = submit_bulk_msg(devh, msg, bulk_msg_cb, &bulkh, timeout, urbtype);
if (!urbh)
return -1;
while (!bulkh.status) {
int r = fpusb_poll();
if (r < 0) {
fpusb_urb_handle_cancel_sync(devh, urbh);
fpusb_urb_handle_free(urbh);
return r;
}
}
*transferred = bulkh.actual_length;
fpusb_urb_handle_free(urbh);
switch (bulkh.status) {
case FP_URB_COMPLETED:
return 0;
case FP_URB_TIMEOUT:
return -ETIMEDOUT;
default:
fp_warn("unrecognised status code %d", bulkh.status);
return -1;
}
}
API_EXPORTED int fpusb_intr_msg(struct fpusb_dev_handle *devh,
struct fpusb_bulk_msg *msg, int *transferred, unsigned int timeout)
{
return do_sync_bulk_msg(devh, msg, transferred, timeout,
USB_URB_TYPE_INTERRUPT);
}
API_EXPORTED int fpusb_bulk_msg(struct fpusb_dev_handle *devh,
struct fpusb_bulk_msg *msg, int *transferred, unsigned int timeout)
{
return do_sync_bulk_msg(devh, msg, transferred, timeout,
USB_URB_TYPE_BULK);
}
API_EXPORTED void fpusb_urb_handle_free(struct fpusb_urb_handle *urbh)
{
if (!urbh)
return;
if (!(urbh->flags & FPUSB_URBH_DATA_BELONGS_TO_USER))
free(urbh->urb.buffer);
free(urbh);
}

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libfpusb/signalfd.h Normal file
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/*
* signalfd header
* Copyright (C) 2007 Daniel Drake <dsd@gentoo.org>
*
* Based on glibc header
* Copyright (C) 2007 Free Software Foundation, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef __FPUSB_SIGNALFD_H__
#define __FPUSB_SIGNALFD_H__
/* FIXME: in future, remove this and unconditionally use glibc directly when
* glibc-2.8 is widespread */
#include <signal.h>
#include <stdint.h>
#ifdef __i386__
#define __NR_signalfd 321
#elif defined(__x86_64__)
#define __NR_signalfd 282
#else
#error "signalfd unsupported on this architecture"
#endif
/* signalfd() implementation was added as of glibc-2.7 */
#if __GLIBC_PREREQ(2, 7)
int signalfd(int fd, const sigset_t *mask, int flags);
#else
#include <sys/syscall.h>
#define SIZEOF_SIG (_NSIG / 8)
#define SIZEOF_SIGSET (SIZEOF_SIG > sizeof(sigset_t) ? sizeof(sigset_t): SIZEOF_SIG)
static inline int signalfd(int fd, const sigset_t *mask, int flags)
{
return syscall(__NR_signalfd, fd, mask, SIZEOF_SIGSET);
}
#endif
struct signalfd_siginfo {
uint32_t ssi_signo;
int32_t ssi_errno;
int32_t ssi_code;
uint32_t ssi_pid;
uint32_t ssi_uid;
int32_t ssi_fd;
uint32_t ssi_tid;
uint32_t ssi_band;
uint32_t ssi_overrun;
uint32_t ssi_trapno;
int32_t ssi_status;
int32_t ssi_int;
uintptr_t ssi_ptr;
uint64_t ssi_utime;
uint64_t ssi_stime;
uint64_t ssi_addr;
uint8_t __pad[48];
};
#endif

135
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/*
* usbfs header structures
* Copyright (C) 2007 Daniel Drake <dsd@gentoo.org>
*
* Portions based on libusb-0.1
* Copyright (c) 2001 Johannes Erdfelt <johannes@erdfelt.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef __FPUSB_USBFS_H__
#define __FPUSB_USBFS_H__
struct usb_ctrltransfer {
/* keep in sync with usbdevice_fs.h:usbdevfs_ctrltransfer */
uint8_t bRequestType;
uint8_t bRequest;
uint16_t wValue;
uint16_t wIndex;
uint16_t wLength;
uint32_t timeout; /* in milliseconds */
/* pointer to data */
void *data;
};
struct usb_bulktransfer {
/* keep in sync with usbdevice_fs.h:usbdevfs_bulktransfer */
unsigned int ep;
unsigned int len;
unsigned int timeout; /* in milliseconds */
/* pointer to data */
void *data;
};
struct usb_setinterface {
/* keep in sync with usbdevice_fs.h:usbdevfs_setinterface */
unsigned int interface;
unsigned int altsetting;
};
#define USB_MAXDRIVERNAME 255
struct usb_getdriver {
unsigned int interface;
char driver[USB_MAXDRIVERNAME + 1];
};
#define USB_URB_DISABLE_SPD 1
#define USB_URB_ISO_ASAP 2
#define USB_URB_QUEUE_BULK 0x10
enum usb_urb_type {
USB_URB_TYPE_ISO = 0,
USB_URB_TYPE_INTERRUPT = 1,
USB_URB_TYPE_CONTROL = 2,
USB_URB_TYPE_BULK = 3,
};
struct usb_iso_packet_desc {
unsigned int length;
unsigned int actual_length;
unsigned int status;
};
#define MAX_URB_BUFFER_LENGTH 16384
struct usb_urb {
unsigned char type;
unsigned char endpoint;
int status;
unsigned int flags;
void *buffer;
int buffer_length;
int actual_length;
int start_frame;
int number_of_packets;
int error_count;
unsigned int signr;
void *usercontext;
struct usb_iso_packet_desc iso_frame_desc[0];
};
struct usb_connectinfo {
unsigned int devnum;
unsigned char slow;
};
struct usb_ioctl {
int ifno; /* interface 0..N ; negative numbers reserved */
int ioctl_code; /* MUST encode size + direction of data so the
* macros in <asm/ioctl.h> give correct values */
void *data; /* param buffer (in, or out) */
};
struct usb_hub_portinfo {
unsigned char numports;
unsigned char port[127]; /* port to device num mapping */
};
#define IOCTL_USB_CONTROL _IOWR('U', 0, struct usb_ctrltransfer)
#define IOCTL_USB_BULK _IOWR('U', 2, struct usb_bulktransfer)
#define IOCTL_USB_RESETEP _IOR('U', 3, unsigned int)
#define IOCTL_USB_SETINTF _IOR('U', 4, struct usb_setinterface)
#define IOCTL_USB_SETCONFIG _IOR('U', 5, unsigned int)
#define IOCTL_USB_GETDRIVER _IOW('U', 8, struct usb_getdriver)
#define IOCTL_USB_SUBMITURB _IOR('U', 10, struct usb_urb)
#define IOCTL_USB_DISCARDURB _IO('U', 11)
#define IOCTL_USB_REAPURB _IOW('U', 12, void *)
#define IOCTL_USB_REAPURBNDELAY _IOW('U', 13, void *)
#define IOCTL_USB_CLAIMINTF _IOR('U', 15, unsigned int)
#define IOCTL_USB_RELEASEINTF _IOR('U', 16, unsigned int)
#define IOCTL_USB_CONNECTINFO _IOW('U', 17, struct usb_connectinfo)
#define IOCTL_USB_IOCTL _IOWR('U', 18, struct usb_ioctl)
#define IOCTL_USB_HUB_PORTINFO _IOR('U', 19, struct usb_hub_portinfo)
#define IOCTL_USB_RESET _IO('U', 20)
#define IOCTL_USB_CLEAR_HALT _IOR('U', 21, unsigned int)
#define IOCTL_USB_DISCONNECT _IO('U', 22)
#define IOCTL_USB_CONNECT _IO('U', 23)
#endif