Resync new repository with old repo r5166

git-svn-id: http://svn.code.sf.net/p/nuttx/code/trunk@5153 42af7a65-404d-4744-a932-0658087f49c3
2026-10-16 10:53:34 +08:00 · 2012-09-17 18:18:44 +00:00
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+/****************************************************************************
+ * drivers/usbdev/usbdev_trace.c
+ *
+ *   Copyright (C) 2008-2010, 2012 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 <sys/types.h>
+#include <stdint.h>
+#include <errno.h>
+#include <debug.h>
+
+#include <arch/irq.h>
+#include <nuttx/usb/usbdev_trace.h>
+#undef usbtrace
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/* Configuration ************************************************************/
+
+#ifndef CONFIG_USBDEV_TRACE_NRECORDS
+#  define CONFIG_USBDEV_TRACE_NRECORDS 128
+#endif
+
+#ifndef CONFIG_USBDEV_TRACE_INITIALIDSET
+#  define CONFIG_USBDEV_TRACE_INITIALIDSET 0
+#endif
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+#ifdef CONFIG_USBDEV_TRACE
+static struct usbtrace_s g_trace[CONFIG_USBDEV_TRACE_NRECORDS];
+static uint16_t g_head = 0;
+static uint16_t g_tail = 0;
+#endif
+
+#if defined(CONFIG_USBDEV_TRACE) || (defined(CONFIG_DEBUG) && defined(CONFIG_DEBUG_USB))
+static usbtrace_idset_t g_maskedidset = CONFIG_USBDEV_TRACE_INITIALIDSET;
+#endif
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/*******************************************************************************
+ * Name: usbtrace_enable
+ *
+ * Description:
+ *  Enable/disable tracing per trace ID.  The initial state is all IDs enabled.
+ *
+ * Input Parameters:
+ *  idset - The bitset of IDs to be masked.  TRACE_ALLIDS enables all IDS; zero
+ *  masks all IDs.
+ *
+ * Returned Value:
+ *  The previous idset value.
+ *
+ * Assumptions:
+ * - May be called from an interrupt handler
+ *
+ *******************************************************************************/
+
+#if defined(CONFIG_USBDEV_TRACE) || (defined(CONFIG_DEBUG) && defined(CONFIG_DEBUG_USB))
+usbtrace_idset_t usbtrace_enable(usbtrace_idset_t idset)
+{
+  irqstate_t flags;
+  usbtrace_idset_t ret;
+
+  /* The following read and write must be atomic */
+
+  flags         = irqsave();
+  ret           = g_maskedidset;
+  g_maskedidset = idset;
+  irqrestore(flags);
+  return ret;
+}
+#endif /* CONFIG_USBDEV_TRACE || CONFIG_DEBUG && CONFIG_DEBUG_USB */
+
+/*******************************************************************************
+ * Name: usbtrace
+ *
+ * Description:
+ *  Record a USB event (tracing must be enabled)
+ *
+ * Assumptions:
+ *   May be called from an interrupt handler
+ *
+ *******************************************************************************/
+
+#if defined(CONFIG_USBDEV_TRACE) || (defined(CONFIG_DEBUG) && defined(CONFIG_DEBUG_USB))
+void usbtrace(uint16_t event, uint16_t value)
+{
+  irqstate_t flags;
+
+  /* Check if tracing is enabled for this ID */
+
+  flags = irqsave();
+  if ((g_maskedidset & TRACE_ID2BIT(event)) != 0)
+    {
+#ifdef CONFIG_USBDEV_TRACE
+      /* Yes... save the new trace data at the head */
+
+      g_trace[g_head].event = event;
+      g_trace[g_head].value = 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;
+            }
+        }
+#else
+      /* Just print the data using lib_lowprintf */
+
+      usbtrace_trprintf((trprintf_t)lib_lowprintf, event, value);
+#endif
+    }
+  irqrestore(flags);
+}
+#endif /* CONFIG_USBDEV_TRACE || CONFIG_DEBUG && CONFIG_DEBUG_USB */
+
+/*******************************************************************************
+ * Name: usbtrace_enumerate
+ *
+ * Description:
+ *   Enumerate all buffer trace data (will temporarily disable tracing)
+ *
+ * Assumptions:
+ *   NEVER called from an interrupt handler
+ *
+ *******************************************************************************/
+
+#ifdef CONFIG_USBDEV_TRACE
+int usbtrace_enumerate(trace_callback_t callback, void *arg)
+{
+  uint16_t ndx;
+  uint32_t idset;
+  int ret = OK;
+
+  /* Temporarily disable tracing */
+
+  idset = usbtrace_enable(0);
+
+  /* Visit every entry, starting with the tail */
+
+  for (ndx = g_tail; ndx != 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;
+        }
+    }
+
+  /* Discard the trace data after it has been reported */
+
+  g_tail = g_head;
+
+  /* Restore tracing state */
+
+  (void)usbtrace_enable(idset);
+  return ret;
+}
+#endif /* CONFIG_USBDEV_TRACE */