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USBDEV trace

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@962 42af7a65-404d-4744-a932-0658087f49c3
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patacongo 2008-09-30 00:50:22 +00:00
parent 174a043a62
commit 1f8cc4383a
2 changed files with 248 additions and 0 deletions
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44
drivers/usbdev/Make.defs Normal file
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############################################################################
# drivers/net/Make.defs
#
# Copyright (C) 2008 Gregory Nutt. All rights reserved.
# Author: Gregory Nutt <spudmonkey@racsa.co.cr>
#
# 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.
#
############################################################################
USBDEV_ASRCS =
USBDEV_CSRCS =
ifeq ($(CONFIG_USBDEV),y)
ifeq ($(CONFIG_USBDEV_TRACE),y)
USBDEV_CSRCS += usbdev_trace.c
endif
endif

204
drivers/usbdev/usbdev_trace.c Normal file
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/****************************************************************************
* drivers/usbdev/usbdev_trace.c
*
* Copyright (C) 2008 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* 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 <sys/types.h>
#include <errno.h>
#include <arch/irq.h>
#include <nuttx/usbdev_trace.h>
#ifdef CONFIG_USBDEV_TRACE
/****************************************************************************
* Definitions
****************************************************************************/
/* Configuration ************************************************************/
#ifndef CONFIG_USBDEV_TRACE_NRECORDS
# define CONFIG_USBDEV_TRACE_NRECORDS 128
#endif
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
static uint16 g_disablecount = 0; /* != 0 means tracing is disabled */
static struct usbtrace_s g_trace[CONFIG_USBDEV_TRACE_NRECORDS];
static uint16 g_head = 0;
static uint16 g_tail = 0;
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/*******************************************************************************
* Name: usbtrace_enable
*
* Description:
* Enable/disable tracing
*
* Assumptions:
* - Initial state is enabled
* - May be called from an interrupt handler
*
*******************************************************************************/
void usbtrace_enable(boolean enable)
{
irqstate_t flags;
flags = irqsave();
if (enable)
{
if (g_disablecount < 0xffff)
{
g_disablecount++;
}
}
else if (g_disablecount > 0)
{
g_disablecount--;
}
irqrestore(flags);
}
/*******************************************************************************
* Name: usbtrace
*
* Description:
* Record a USB event (tracing must be enabled)
*
* Assumptions:
* May be called from an interrupt handler
*
*******************************************************************************/
void usbtrace(uint16 event, uint16 value)
{
irqstate_t flags;
/* Check if tracing is enabled */
flags = irqsave();
if (!g_disablecount)
{
/* Yes... save the new trace data at the nead */
g_trace[g_head].event = event;
g_trace[g_tail].event = value;
/* Increment the head and (probably) the tail index */
if (++g_head >= CONFIG_USBDEV_TRACE_NRECORDS)
{
g_head = 0;
}
if (g_head == g_tail)
{
if (++g_tail >= CONFIG_USBDEV_TRACE_NRECORDS)
{
g_tail = 0;
}
}
}
irqrestore(flags);
}
/*******************************************************************************
* Name: usbtrace_enumerate
*
* Description:
* Enumerate all buffer trace data (will temporarily disable tracing)
*
* Assumptions:
* NEVER called from an interrupt handler
*
*******************************************************************************/
int usbtrace_enumerate(trace_callback_t callback, void *arg)
{
uint16 ndx = g_tail;
int ret = OK;
/* Temporarily disable tracing */
usbtrace_enable(FALSE);
/* Visit every entry, starting with the tail */
while (g_tail != g_head)
{
/* Call the user provided callback */
ret = callback(&g_trace[ndx], arg);
if (ret != OK)
{
/* Abort the enumeration */
break;
}
/* Increment the index */
if (++ndx >= CONFIG_USBDEV_TRACE_NRECORDS)
{
ndx = 0;
}
}
return ret;
}
#endif /* CONFIG_USBDEV_TRACE */