/**************************************************************************** * drivers/usbmonitor/usbmonitor.c * * Copyright (C) 2013, 2016 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * 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 #include #include #include #include #include #include #include #include #include #include #include #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) { 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 values: * 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 = kernel_thread("USB Monitor", CONFIG_USBMONITOR_PRIORITY, CONFIG_USBMONITOR_STACKSIZE, (main_t)usbmonitor_daemon, (FAR char * const *)NULL); if (ret < 0) { int errcode = errno; uerr("ERROR: Failed to start the USB monitor: %d\n", errcode); UNUSED(errcode); } else { g_usbmonitor.pid = ret; uinfo("Started: %d\n", g_usbmonitor.pid); } sched_unlock(); return 0; } sched_unlock(); uinfo("%s: %d\n", g_usbmonitor.stop ? "Stopping" : "Running", g_usbmonitor.pid); return 0; } /**************************************************************************** * Name: usbmonitor_stop * * Stop the USB monitor kernel daemon. * * Input Parameters: * None * * Returned values: * 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 */