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incubator-nuttx/drivers/usbmonitor/usbmonitor.c

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/****************************************************************************
* drivers/usbmonitor/usbmonitor.c
*
* Copyright (C) 2013, 2016-2017 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <nuttx/progmem.h>
#include <sys/types.h>
#include <stdarg.h>
#include <stdbool.h>
#include <unistd.h>
#include <sched.h>
#include <syslog.h>
#include <errno.h>
#include <nuttx/signal.h>
#include <nuttx/kthread.h>
#include <nuttx/usb/usbdev_trace.h>
#include <nuttx/usb/usbhost_trace.h>
#ifdef CONFIG_USBMONITOR
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Configuration ************************************************************/
#ifndef CONFIG_USBMONITOR_STACKSIZE
# define CONFIG_USBMONITOR_STACKSIZE 2048
#endif
#ifndef CONFIG_USBMONITOR_PRIORITY
# define CONFIG_USBMONITOR_PRIORITY 50
#endif
#ifndef CONFIG_USBMONITOR_INTERVAL
# define CONFIG_USBMONITOR_INTERVAL 2
#endif
/* USB device trace selection */
#ifdef CONFIG_USBDEV_TRACE
# ifdef CONFIG_USBMONITOR_TRACEINIT
# define TRACE_INIT_BITS (TRACE_INIT_BIT)
# else
# define TRACE_INIT_BITS (0)
# endif
# define TRACE_ERROR_BITS (TRACE_DEVERROR_BIT|TRACE_CLSERROR_BIT)
# ifdef CONFIG_USBMONITOR_TRACECLASS
# define TRACE_CLASS_BITS (TRACE_CLASS_BIT|TRACE_CLASSAPI_BIT|\
TRACE_CLASSSTATE_BIT)
# else
# define TRACE_CLASS_BITS (0)
# endif
# ifdef CONFIG_USBMONITOR_TRACETRANSFERS
# define TRACE_TRANSFER_BITS (TRACE_OUTREQQUEUED_BIT|TRACE_INREQQUEUED_BIT|\
TRACE_READ_BIT|TRACE_WRITE_BIT|\
TRACE_COMPLETE_BIT)
# else
# define TRACE_TRANSFER_BITS (0)
# endif
# ifdef CONFIG_USBMONITOR_TRACECONTROLLER
# define TRACE_CONTROLLER_BITS (TRACE_EP_BIT|TRACE_DEV_BIT)
# else
# define TRACE_CONTROLLER_BITS (0)
# endif
# ifdef CONFIG_USBMONITOR_TRACEINTERRUPTS
# define TRACE_INTERRUPT_BITS (TRACE_INTENTRY_BIT|TRACE_INTDECODE_BIT|\
TRACE_INTEXIT_BIT)
# else
# define TRACE_INTERRUPT_BITS (0)
# endif
# define TRACE_BITSET (TRACE_INIT_BITS|TRACE_ERROR_BITS|\
TRACE_CLASS_BITS|TRACE_TRANSFER_BITS|\
TRACE_CONTROLLER_BITS|TRACE_INTERRUPT_BITS)
#endif
/****************************************************************************
* Private Types
****************************************************************************/
struct usbmon_state_s
{
volatile bool started;
volatile bool stop;
pid_t pid;
};
/****************************************************************************
* Private Data
****************************************************************************/
static struct usbmon_state_s g_usbmonitor;
/****************************************************************************
* Private Functions
****************************************************************************/
#ifdef CONFIG_USBDEV_TRACE
static int usbtrace_syslog(FAR const char *fmt, ...)
{
va_list ap;
int ret;
/* Let vsyslog do the real work */
va_start(ap, fmt);
ret = vsyslog(LOG_INFO, fmt, ap);
va_end(ap);
return ret;
}
static int usbmonitor_tracecallback(struct usbtrace_s *trace, void *arg)
{
usbtrace_trprintf(usbtrace_syslog, trace->event, trace->value);
return 0;
}
#endif
static int usbmonitor_daemon(int argc, char **argv)
{
uinfo("Running: %d\n", g_usbmonitor.pid);
/* Loop until we detect that there is a request to stop. */
while (!g_usbmonitor.stop)
{
nxsig_sleep(CONFIG_USBMONITOR_INTERVAL);
#ifdef CONFIG_USBDEV_TRACE
(void)usbtrace_enumerate(usbmonitor_tracecallback, NULL);
#endif
#ifdef CONFIG_USBHOST_TRACE
(void)usbhost_trdump();
#endif
}
/* Stopped */
g_usbmonitor.stop = false;
g_usbmonitor.started = false;
uinfo("Stopped: %d\n", g_usbmonitor.pid);
return 0;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: usbmonitor_start
*
* Start the USB monitor kernal daemon.
*
* Input Parameters:
* None
*
* Returned Value:
* Zero (OK) is returned on success; a negated errno value is return on
* any failure.
*
****************************************************************************/
int usbmonitor_start(void)
{
/* Has the monitor already started? */
sched_lock();
if (!g_usbmonitor.started)
{
int ret;
/* No.. start it now */
#ifdef CONFIG_USBDEV_TRACE
/* First, initialize any USB tracing options that were requested */
usbtrace_enable(TRACE_BITSET);
#endif
/* Then start the USB monitoring daemon */
g_usbmonitor.started = true;
g_usbmonitor.stop = false;
ret = kthread_create("USB Monitor", CONFIG_USBMONITOR_PRIORITY,
CONFIG_USBMONITOR_STACKSIZE,
(main_t)usbmonitor_daemon,
(FAR char * const *)NULL);
if (ret < 0)
{
uerr("ERROR: Failed to start the USB monitor: %d\n",
ret);
}
else
{
g_usbmonitor.pid = ret;
uinfo("Started: %d\n", g_usbmonitor.pid);
ret = OK;
}
sched_unlock();
return ret;
}
sched_unlock();
uinfo("%s: %d\n",
g_usbmonitor.stop ? "Stopping" : "Running", g_usbmonitor.pid);
return OK;
}
/****************************************************************************
* Name: usbmonitor_stop
*
* Stop the USB monitor kernel daemon.
*
* Input Parameters:
* None
*
* Returned Value:
* Zero (OK) is returned on success; a negated errno value is return on
* any failure.
*
****************************************************************************/
int usbmonitor_stop(void)
{
/* Has the monitor already started? */
if (g_usbmonitor.started)
{
/* Stop the USB monitor. The next time the monitor wakes up,
* it will see the stop indication and will exist.
*/
uinfo("Stopping: %d\n", g_usbmonitor.pid);
g_usbmonitor.stop = true;
#ifdef CONFIG_USBDEV_TRACE
/* We may as well disable tracing since there is no listener */
usbtrace_enable(0);
#endif
}
uinfo("Stopped: %d\n", g_usbmonitor.pid);
return 0;
}
#endif /* CONFIG_USBMONITOR */
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