NSH: Add an option to take stdin from a USB keyboard device

8 files changed, 452 insertions, 88 deletions

diff --git a/apps/nshlib/Kconfig b/apps/nshlib/Kconfig
index d4bca38e7..966856516 100644
--- a/apps/nshlib/Kconfig
+++ b/apps/nshlib/Kconfig
@@ -597,34 +597,60 @@ config NSH_CONSOLE
 		serial device as the NSH console (not necessarily dev/console).
 
 config NSH_USBCONSOLE
-	bool "Use a USB console"
+	bool "Use a USB serial console"
 	default n
-	depends on NSH_CONSOLE && USBDEV
+	depends on NSH_CONSOLE && USBDEV && (CDCACM || PL2303)
 	---help---
-		If defined, then the an arbitrary USB device may be used
-		to as the NSH console.  In this case, NSH_USBCONDEV must
-		be defined to indicate which USB device to use as the
-		console.
+		If defined, then the an arbitrary USB serial device may be used
+		to as the NSH console.  In this case, NSH_USBCONDEV must be defined
+		to indicate which USB serial device to use as the console.
+
+if NSH_USBCONSOLE
 
 config NSH_USBCONDEV
-	string "USB console device"
-	default "/dev/ttyACM0"
-	depends on NSH_USBCONSOLE
+	string "USB serial console device"
+	default "/dev/ttyACM0" if CDCACM
+	default "/dev/ttyUSB0" if !CDCACM
 	---help---
 		If NSH_USBCONSOLE is set to 'y', then NSH_USBCONDEV must
 		also be set to select the USB device used to support the
 		NSH console.   This should be set to the quoted name of a
-		readable/write-able USB driver such as:
-		NSH_USBCONDEV="/dev/ttyACM0".
+		read-/write-able USB driver.  Default: "/dev/ttyACM0".
 
 config USBDEV_MINOR
-	int "USB console device minor number"
+	int "USB serial console device minor number"
 	default 0
-	depends on NSH_USBCONSOLE
 	---help---
 		If there are more than one USB devices, then a USB device
 		minor number may also need to be provided. Default: 0
 
+endif # NSH_USBCONSOLE
+
+config NSH_USBKBD
+	bool "Use a USB keyboard input"
+	default n
+	depends on NSH_CONSOLE && USBHOST_HIDKBD && !NSH_USBCONSOLE
+	---help---
+		Normally NSH uses the same device for stdin, stdout, and stderr.  By
+		default, that device is /dev/console.  If this option is selected,
+		then NSH will use a USB HID keyboard for stdin.  In this case, the
+		keyboard is connected directly to the target (via a USB host
+		interface) and the data from the keyboard will drive NSH.  NSH
+		output (stdout and stderr) will still go to /dev/console.
+
+if NSH_USBKBD
+
+config NSH_USBKBD_DEVNAME
+	string "USB keyboard device"
+	default "/dev/kbda"
+	---help---
+		If NSH_USBKBD is set to 'y', then NSH_USBKBD_DEVNAME must also be
+		set to select the USB keyboard device used to support the NSH
+		console input.   This should be set to the quoted name of a read-
+		able keyboard driver. Default: "/dev/kbda".
+
+endif #NSH_USBKBD
+
 comment "USB Trace Support"
 
 config NSH_USBDEV_TRACE
diff --git a/apps/nshlib/Makefile b/apps/nshlib/Makefile
index c5eb5c53d..a78299222 100644
--- a/apps/nshlib/Makefile
+++ b/apps/nshlib/Makefile
@@ -90,7 +90,15 @@ CSRCS += nsh_test.c
 endif
 
 ifeq ($(CONFIG_USBDEV),y)
-CSRCS += nsh_usbdev.c
+CSRCS += nsh_usbconsole.c
+endif
+
+ifeq ($(CONFIG_USBHOST),y)
+CSRCS += nsh_usbkeyboard.c
+endif
+
+ifeq ($(CONFIG_NSH_USBDEV_TRACE),y)
+CSRCS += nsh_usbtrace.c
 endif
 
 ifeq ($(CONFIG_NETUTILS_CODECS),y)
diff --git a/apps/nshlib/README.txt b/apps/nshlib/README.txt
index d894c9deb..91cb19983 100644
--- a/apps/nshlib/README.txt
+++ b/apps/nshlib/README.txt
@@ -1183,8 +1183,7 @@ NSH-Specific Configuration Settings
         If CONFIG_NSH_USBCONSOLE is set to 'y', then CONFIG_NSH_USBCONDEV
         must also be set to select the USB device used to support
         the NSH console.   This should be set to the quoted name of a
-        readable/write-able USB driver such as:
-        CONFIG_NSH_USBCONDEV="/dev/ttyACM0".
+        read-/write-able USB driver.  Default: "/dev/ttyACM0".
 
       If there are more than one USB devices, then a USB device
       minor number may also need to be provided:
@@ -1192,6 +1191,20 @@ NSH-Specific Configuration Settings
       CONFIG_NSH_USBDEV_MINOR
         The minor device number of the USB device.  Default: 0
 
+      CONFIG_NSH_USBKBD
+        Normally NSH uses the same device for stdin, stdout, and stderr.  By
+        default, that device is /dev/console.  If this option is selected,
+        then NSH will use a USB HID keyboard for stdin.  In this case, the
+        keyboard is connected directly to the target (via a USB host
+        interface) and the data from the keyboard will drive NSH.  NSH
+        output (stdout and stderr) will still go to /dev/console.
+
+      CONFIG_NSH_USBKBD_DEVNAME
+        If NSH_USBKBD is set to 'y', then NSH_USBKBD_DEVNAME must also be
+        set to select the USB keyboard device used to support the NSH
+        console input.   This should be set to the quoted name of a read-
+        able keyboard driver. Default: "/dev/kbda".
+
       CONFIG_NSH_USBDEV_TRACE
         If USB tracing is enabled (CONFIG_USBDEV_TRACE), then NSH can
         be configured to show the buffered USB trace data afer each
diff --git a/apps/nshlib/nsh.h b/apps/nshlib/nsh.h
index 9546155cd..f15eaf5d6 100644
--- a/apps/nshlib/nsh.h
+++ b/apps/nshlib/nsh.h
@@ -146,20 +146,46 @@
 
 #ifdef HAVE_USB_CONSOLE
 
-/* The default USB console device minor number is 0*/
+/* The default USB console device minor number is 0 */
 
 #  ifndef CONFIG_NSH_USBDEV_MINOR
 #    define CONFIG_NSH_USBDEV_MINOR 0
 #  endif
 
-/* The default console device is always /dev/console */
+/* The default USB serial console device */
 
 #  ifndef CONFIG_NSH_USBCONDEV
-#    define CONFIG_NSH_USBCONDEV "/dev/console"
+#    if defined(CONFIG_CDCACM)
+#      define CONFIG_NSH_USBCONDEV "/dev/ttyACM0"
+#    elif defined(CONFIG_PL2303)
+#      define CONFIG_NSH_USBCONDEV "/dev/ttyUSB0"
+#    else
+#      define CONFIG_NSH_USBCONDEV "/dev/console"
+#    endif
 #  endif
 
 #endif /* HAVE_USB_CONSOLE */
 
+/* If a USB keyboard device is selected for NSH input then we need to handle
+ * some special start-up conditions.
+ */
+
+#undef HAVE_USB_KEYBOARD
+#if defined(CONFIG_USBHOST) && !defined(HAVE_USB_CONSOLE)
+
+/* Check for a USB HID keyboard in the configuration */
+
+#  ifdef CONFIG_USBHOST_HIDKBD
+#    define HAVE_USB_KEYBOARD 1
+
+/* The default keyboard device is /dev/kbda */
+
+#    ifndef NSH_USBKBD_DEVNAME
+#      define NSH_USBKBD_DEVNAME "/dev/kbda"
+#    endif
+#  endif
+#endif /* HAVE_USB_KEYBOARD */
+
 /* USB trace settings */
 
 #ifndef CONFIG_USBDEV_TRACE
diff --git a/apps/nshlib/nsh_consolemain.c b/apps/nshlib/nsh_consolemain.c
index 42353d3f4..a8e7bd72a 100644
--- a/apps/nshlib/nsh_consolemain.c
+++ b/apps/nshlib/nsh_consolemain.c
@@ -45,7 +45,7 @@
 #include "nsh.h"
 #include "nsh_console.h"
 
-#ifndef HAVE_USB_CONSOLE
+#if !defined(HAVE_USB_CONSOLE) && !defined(HAVE_USB_KEYBOARD)
 
 /****************************************************************************
  * Pre-processor Definitions
@@ -84,8 +84,8 @@
  *   function does not normally return (see below).
  *
  *   This version of nsh_consolmain handles generic /dev/console character
- *   devices (see nsh_usbdev.c for another version for special USB console
- *   devices).
+ *   devices (see nsh_usbconsole.c and usb_usbkeyboard for other versions
+ *   for special USB console devices).
   *
  * Input Parameters:
  *   Standard task start-up arguments.  These are not used.  argc may be
@@ -127,4 +127,4 @@ int nsh_consolemain(int argc, char *argv[])
   return ret;
 }
 
-#endif /* !HAVE_USB_CONSOLE */
+#endif /* !HAVE_USB_CONSOLE && !HAVE_USB_KEYBOARD */
diff --git a/apps/nshlib/nsh_usbdev.c b/apps/nshlib/nsh_usbconsole.c
index ec80df481..800b36413 100644
--- a/apps/nshlib/nsh_usbdev.c
+++ b/apps/nshlib/nsh_usbconsole.c
@@ -1,7 +1,7 @@
 /****************************************************************************
- * apps/nshlib/nsh_usbdev.c
+ * apps/nshlib/nsh_usbconsole.c
  *
- *   Copyright (C) 2012-2013 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2012-2014 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -57,23 +57,13 @@
 #include "nsh.h"
 #include "nsh_console.h"
 
+#ifdef HAVE_USB_CONSOLE
+
 /****************************************************************************
  * Pre-processor Definitions
  ****************************************************************************/
-/* Output USB trace data to the console device using printf() unless (1)
- * debug is enabled, then we want to keep the trace output in sync with the
- * debug output by using syslog()we are using a USB console.  In that case,
- * we don't want the trace output on the USB console; let's try sending it
- * a SYSLOG device (hopefully one is set up!)
- */
-
-#if defined(CONFIG_DEBUG) || defined(HAVE_USB_CONSOLE)
-#  define trmessage syslog
-#else
-#  define trmessage printf
-#endif
 
-/****************************************************************************
+ /****************************************************************************
  * Private Types
  ****************************************************************************/
 
@@ -94,26 +84,6 @@
  ****************************************************************************/
 
 /****************************************************************************
- * Name: nsh_tracecallback
- ****************************************************************************/
-
-/****************************************************************************
- * Name: nsh_tracecallback
- *
- * Description:
- *   This is part of the USB trace logic
- *
- ****************************************************************************/
-
-#ifdef CONFIG_NSH_USBDEV_TRACE
-static int nsh_tracecallback(struct usbtrace_s *trace, void *arg)
-{
-  usbtrace_trprintf((trprintf_t)trmessage, trace->event, trace->value);
-  return 0;
-}
-#endif
-
-/****************************************************************************
  * Name: nsh_configstdio
  *
  * Description:
@@ -121,7 +91,6 @@ static int nsh_tracecallback(struct usbtrace_s *trace, void *arg)
  *
  ****************************************************************************/
 
-#ifdef HAVE_USB_CONSOLE
 static void nsh_configstdio(int fd)
 {
   /* Make sure the stdin, stdout, and stderr are closed */
@@ -149,7 +118,6 @@ static void nsh_configstdio(int fd)
   (void)fdopen(1, "a");
   (void)fdopen(2, "a");
 }
-#endif
 
 /****************************************************************************
  * Name: nsh_nullstdio
@@ -159,7 +127,6 @@ static void nsh_configstdio(int fd)
  *
  ****************************************************************************/
 
-#ifdef HAVE_USB_CONSOLE
 static int nsh_nullstdio(void)
 {
   int fd;
@@ -187,7 +154,6 @@ static int nsh_nullstdio(void)
 
   return fd;
 }
-#endif
 
 /****************************************************************************
  * Name: nsh_waitusbready
@@ -197,7 +163,6 @@ static int nsh_nullstdio(void)
  *
  ****************************************************************************/
 
-#ifdef HAVE_USB_CONSOLE
 static int nsh_waitusbready(void)
 {
   char inch;
@@ -277,7 +242,6 @@ static int nsh_waitusbready(void)
 
   return OK;
 }
-#endif
 
 /****************************************************************************
  * Public Functions
@@ -307,7 +271,6 @@ static int nsh_waitusbready(void)
  *
  ****************************************************************************/
 
-#ifdef HAVE_USB_CONSOLE
 int nsh_consolemain(int argc, char *argv[])
 {
   FAR struct console_stdio_s *pstate = nsh_newconsole();
@@ -330,7 +293,7 @@ int nsh_consolemain(int argc, char *argv[])
   ret = usbdev_serialinitialize(CONFIG_NSH_USBDEV_MINOR);
 #endif
 
-  (void)ret; /* Eliminate warning if not used */
+  UNUSED(ret); /* Eliminate warning if not used */
   DEBUGASSERT(ret == OK);
 #endif
 
@@ -370,26 +333,5 @@ int nsh_consolemain(int argc, char *argv[])
       (void)nsh_nullstdio();
     }
 }
-#endif
-
-/****************************************************************************
- * Name: nsh_usbtrace
- *
- * Description:
- *   The function is called from the nsh_session() to dump USB data to the
- *   SYSLOG device.
- *
- * Input Parameters:
- *   None
- *
- * Returned Values:
- *   None
- *
- ****************************************************************************/
 
-#ifdef CONFIG_NSH_USBDEV_TRACE
-void nsh_usbtrace(void)
-{
-  (void)usbtrace_enumerate(nsh_tracecallback, NULL);
-}
-#endif
+#endif /* HAVE_USB_CONSOLE */
diff --git a/apps/nshlib/nsh_usbkeyboard.c b/apps/nshlib/nsh_usbkeyboard.c
new file mode 100644
index 000000000..845d56a88
--- /dev/null
+++ b/apps/nshlib/nsh_usbkeyboard.c
@@ -0,0 +1,222 @@
+/****************************************************************************
+ * apps/nshlib/nsh_usbkeyboard.c
+ *
+ *   Copyright (C) 2014 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 <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <assert.h>
+#include <debug.h>
+
+#include "nsh.h"
+#include "nsh_console.h"
+
+#if defined(HAVE_USB_KEYBOARD) && !defined(HAVE_USB_CONSOLE)
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+ /****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: nsh_wait_usbready
+ *
+ * Description:
+ *   Wait for the USB keyboard device to be ready
+ *
+ ****************************************************************************/
+
+static int nsh_wait_usbready(FAR const char *msg)
+{
+  int fd;
+
+  /* Don't start the NSH console until the keyboard device is ready.  Chances
+   * are, we get here with no functional stdin.  The USB keyboard device will
+   * not be available until the device is connected to the host and enumerated.
+   */
+
+  /* Open the USB keyboard device for read-only access */
+
+  do
+    {
+      /* Try to open the console */
+
+      fd = open(NSH_USBKBD_DEVNAME, O_RDONLY);
+      if (fd < 0)
+        {
+          /* ENOENT means that the USB device is not yet connected and,
+           * hence, has no entry under /dev.  Anything else would be bad.
+           */
+
+          DEBUGASSERT(errno == ENOENT);
+
+          /* Let the user know that we are waiting */
+
+          if (msg)
+            {
+              /* Show the waiting message only one time after the failure
+               * to open the keyboard device.
+               */
+
+              puts(msg);
+              fflush(stdout);
+              msg = NULL;
+            }
+
+          /* Sleep a bit and try again */
+
+          sleep(2);
+        }
+    }
+  while (fd < 0);
+
+  /* Okay.. we have successfully opened a keyboard device
+   *
+   * Close standard fd 0.  Unbeknownst to stdin.
+   * NOTE: This might not be portable behavior!
+   */
+
+  (void)close(0);
+
+  /* Dup the fd to create standard fd 0.  stdin should not know */
+
+  (void)dup2(fd, 0);
+
+  /* Close the keyboard device that we just opened */
+
+  close(fd);
+  return OK;
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: nsh_consolemain (USB console version)
+ *
+ * Description:
+ *   This interfaces maybe to called or started with task_start to start a
+ *   single an NSH instance that operates on stdin and stdout.  This
+ *   function does not return.
+ *
+ *   This function handles generic /dev/console character devices for output
+ *   but uses a special USB keyboard device for input.  The USB keyboard
+ *   requires some special operations to handle the cases where the session
+ *   input is lost when the USB keyboard is unplugged and restarted when the
+ *   USB keyboard is plugged in again.
+ *
+ * Input Parameters:
+ *   Standard task start-up arguments.  These are not used.  argc may be
+ *   zero and argv may be NULL.
+ *
+ * Returned Values:
+ *   This function does not return nor does it ever exit (unless the user
+ *   executes the NSH exit command).
+ *
+ ****************************************************************************/
+
+int nsh_consolemain(int argc, char *argv[])
+{
+  FAR struct console_stdio_s *pstate = nsh_newconsole();
+  FAR const char *msg;
+  int ret;
+
+  DEBUGASSERT(pstate);
+
+  /* Initialize any USB tracing options that were requested */
+
+#ifdef CONFIG_NSH_USBDEV_TRACE
+  usbtrace_enable(TRACE_BITSET);
+#endif
+
+  /* Execute the one-time start-up script.  Any output will go to /dev/console. */
+
+#ifdef CONFIG_NSH_ROMFSETC
+  (void)nsh_initscript(&pstate->cn_vtbl);
+#endif
+
+  /* Now loop, executing creating a session for each USB connection */
+
+  msg = "Waiting for keyboard to be connected...\n";
+  for (;;)
+    {
+      /* Wait for the USB to be connected to the host and switch
+       * standard I/O to the USB serial device.
+       */
+
+      ret = nsh_wait_usbready(msg);
+
+      (void)ret; /* Eliminate warning if not used */
+      DEBUGASSERT(ret == OK);
+
+      /* Execute the session */
+
+      (void)nsh_session(pstate);
+
+      /* We lost the connection.  Wait for the keyboard to
+       * be re-connected.
+       */
+
+      msg = "Please re-connect the keyboard...\n";
+    }
+}
+
+#endif /* HAVE_USB_KEYBOARD && !HAVE_USB_CONSOLE */
diff --git a/apps/nshlib/nsh_usbtrace.c b/apps/nshlib/nsh_usbtrace.c
new file mode 100644
index 000000000..09f4df7e6
--- /dev/null
+++ b/apps/nshlib/nsh_usbtrace.c
@@ -0,0 +1,127 @@
+/****************************************************************************
+ * apps/nshlib/nsh_usbtrace.c
+ *
+ *   Copyright (C) 2014 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 <stdio.h>
+#include <debug.h>
+
+#include <nuttx/usb/usbdev_trace.h>
+
+#ifdef CONFIG_NSH_USBDEV_TRACE
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+/* Output USB trace data to the console device using printf() unless (1)
+ * debug is enabled, then we want to keep the trace output in sync with the
+ * debug output by using syslog()we are using a USB console.  In that case,
+ * we don't want the trace output on the USB console; let's try sending it
+ * a SYSLOG device (hopefully one is set up!)
+ */
+
+#if defined(CONFIG_DEBUG) || defined(HAVE_USB_CONSOLE)
+#  define trmessage syslog
+#else
+#  define trmessage printf
+#endif
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: nsh_tracecallback
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: nsh_tracecallback
+ *
+ * Description:
+ *   This is part of the USB trace logic
+ *
+ ****************************************************************************/
+
+static int nsh_tracecallback(struct usbtrace_s *trace, void *arg)
+{
+  usbtrace_trprintf((trprintf_t)trmessage, trace->event, trace->value);
+  return 0;
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: nsh_usbtrace
+ *
+ * Description:
+ *   The function is called from the nsh_session() to dump USB data to the
+ *   SYSLOG device.
+ *
+ * Input Parameters:
+ *   None
+ *
+ * Returned Values:
+ *   None
+ *
+ ****************************************************************************/
+
+void nsh_usbtrace(void)
+{
+  (void)usbtrace_enumerate(nsh_tracecallback, NULL);
+}
+
+#endif /* CONFIG_NSH_USBDEV_TRACE */