936df1bcb5
Squashed commit of the following:
Change all calls to usleep() in the OS proper to calls to nxsig_usleep()
sched/signal: Add a new OS internal function nxsig_usleep() that is functionally equivalent to usleep() but does not cause a cancellaption point and does not modify the errno variable.
sched/signal: Add a new OS internal function nxsig_sleep() that is functionally equivalent to sleep() but does not cause a cancellaption point.
294 lines
8.3 KiB
C
294 lines
8.3 KiB
C
/****************************************************************************
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* drivers/usbmonitor/usbmonitor.c
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*
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* Copyright (C) 2013, 2016-2017 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <nuttx/progmem.h>
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#include <sys/types.h>
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#include <stdarg.h>
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#include <stdbool.h>
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#include <unistd.h>
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#include <sched.h>
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#include <syslog.h>
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#include <errno.h>
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#include <nuttx/signal.h>
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#include <nuttx/kthread.h>
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#include <nuttx/usb/usbdev_trace.h>
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#include <nuttx/usb/usbhost_trace.h>
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#ifdef CONFIG_USBMONITOR
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Configuration ************************************************************/
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#ifndef CONFIG_USBMONITOR_STACKSIZE
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# define CONFIG_USBMONITOR_STACKSIZE 2048
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#endif
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#ifndef CONFIG_USBMONITOR_PRIORITY
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# define CONFIG_USBMONITOR_PRIORITY 50
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#endif
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#ifndef CONFIG_USBMONITOR_INTERVAL
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# define CONFIG_USBMONITOR_INTERVAL 2
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#endif
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/* USB device trace selection */
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#ifdef CONFIG_USBDEV_TRACE
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# ifdef CONFIG_USBMONITOR_TRACEINIT
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# define TRACE_INIT_BITS (TRACE_INIT_BIT)
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# else
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# define TRACE_INIT_BITS (0)
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# endif
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# define TRACE_ERROR_BITS (TRACE_DEVERROR_BIT|TRACE_CLSERROR_BIT)
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# ifdef CONFIG_USBMONITOR_TRACECLASS
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# define TRACE_CLASS_BITS (TRACE_CLASS_BIT|TRACE_CLASSAPI_BIT|\
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TRACE_CLASSSTATE_BIT)
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# else
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# define TRACE_CLASS_BITS (0)
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# endif
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# ifdef CONFIG_USBMONITOR_TRACETRANSFERS
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# define TRACE_TRANSFER_BITS (TRACE_OUTREQQUEUED_BIT|TRACE_INREQQUEUED_BIT|\
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TRACE_READ_BIT|TRACE_WRITE_BIT|\
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TRACE_COMPLETE_BIT)
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# else
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# define TRACE_TRANSFER_BITS (0)
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# endif
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# ifdef CONFIG_USBMONITOR_TRACECONTROLLER
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# define TRACE_CONTROLLER_BITS (TRACE_EP_BIT|TRACE_DEV_BIT)
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# else
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# define TRACE_CONTROLLER_BITS (0)
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# endif
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# ifdef CONFIG_USBMONITOR_TRACEINTERRUPTS
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# define TRACE_INTERRUPT_BITS (TRACE_INTENTRY_BIT|TRACE_INTDECODE_BIT|\
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TRACE_INTEXIT_BIT)
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# else
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# define TRACE_INTERRUPT_BITS (0)
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# endif
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# define TRACE_BITSET (TRACE_INIT_BITS|TRACE_ERROR_BITS|\
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TRACE_CLASS_BITS|TRACE_TRANSFER_BITS|\
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TRACE_CONTROLLER_BITS|TRACE_INTERRUPT_BITS)
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#endif
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/****************************************************************************
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* Private Types
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****************************************************************************/
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struct usbmon_state_s
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{
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volatile bool started;
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volatile bool stop;
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pid_t pid;
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};
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/****************************************************************************
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* Private Data
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****************************************************************************/
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static struct usbmon_state_s g_usbmonitor;
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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#ifdef CONFIG_USBDEV_TRACE
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static int usbtrace_syslog(FAR const char *fmt, ...)
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{
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va_list ap;
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int ret;
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/* Let vsyslog do the real work */
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va_start(ap, fmt);
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ret = vsyslog(LOG_INFO, fmt, ap);
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va_end(ap);
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return ret;
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}
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static int usbmonitor_tracecallback(struct usbtrace_s *trace, void *arg)
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{
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usbtrace_trprintf(usbtrace_syslog, trace->event, trace->value);
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return 0;
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}
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#endif
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static int usbmonitor_daemon(int argc, char **argv)
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{
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uinfo("Running: %d\n", g_usbmonitor.pid);
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/* Loop until we detect that there is a request to stop. */
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while (!g_usbmonitor.stop)
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{
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nxsig_sleep(CONFIG_USBMONITOR_INTERVAL);
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#ifdef CONFIG_USBDEV_TRACE
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(void)usbtrace_enumerate(usbmonitor_tracecallback, NULL);
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#endif
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#ifdef CONFIG_USBHOST_TRACE
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(void)usbhost_trdump();
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#endif
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}
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/* Stopped */
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g_usbmonitor.stop = false;
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g_usbmonitor.started = false;
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uinfo("Stopped: %d\n", g_usbmonitor.pid);
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return 0;
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: usbmonitor_start
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*
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* Start the USB monitor kernal daemon.
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*
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* Input Parameters:
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* None
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*
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* Returned values:
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* Zero (OK) is returned on success; a negated errno value is return on
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* any failure.
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*
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****************************************************************************/
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int usbmonitor_start(void)
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{
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/* Has the monitor already started? */
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sched_lock();
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if (!g_usbmonitor.started)
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{
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int ret;
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/* No.. start it now */
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#ifdef CONFIG_USBDEV_TRACE
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/* First, initialize any USB tracing options that were requested */
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usbtrace_enable(TRACE_BITSET);
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#endif
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/* Then start the USB monitoring daemon */
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g_usbmonitor.started = true;
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g_usbmonitor.stop = false;
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ret = kernel_thread("USB Monitor", CONFIG_USBMONITOR_PRIORITY,
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CONFIG_USBMONITOR_STACKSIZE,
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(main_t)usbmonitor_daemon,
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(FAR char * const *)NULL);
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if (ret < 0)
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{
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int errcode = errno;
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uerr("ERROR: Failed to start the USB monitor: %d\n",
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errcode);
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UNUSED(errcode);
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}
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else
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{
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g_usbmonitor.pid = ret;
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uinfo("Started: %d\n", g_usbmonitor.pid);
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}
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sched_unlock();
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return 0;
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}
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sched_unlock();
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uinfo("%s: %d\n",
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g_usbmonitor.stop ? "Stopping" : "Running", g_usbmonitor.pid);
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return 0;
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}
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/****************************************************************************
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* Name: usbmonitor_stop
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*
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* Stop the USB monitor kernel daemon.
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*
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* Input Parameters:
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* None
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*
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* Returned values:
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* Zero (OK) is returned on success; a negated errno value is return on
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* any failure.
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*
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****************************************************************************/
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int usbmonitor_stop(void)
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{
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/* Has the monitor already started? */
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if (g_usbmonitor.started)
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{
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/* Stop the USB monitor. The next time the monitor wakes up,
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* it will see the stop indication and will exist.
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*/
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uinfo("Stopping: %d\n", g_usbmonitor.pid);
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g_usbmonitor.stop = true;
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#ifdef CONFIG_USBDEV_TRACE
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/* We may as well disable tracing since there is no listener */
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usbtrace_enable(0);
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#endif
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}
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uinfo("Stopped: %d\n", g_usbmonitor.pid);
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return 0;
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}
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#endif /* CONFIG_USBMONITOR */
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