diff --git a/ChangeLog b/ChangeLog
index fa6401252fc..9651e94f947 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -5391,4 +5391,8 @@
 	  in up_putc().  I think all architectures have this re-entrancy
 	  than can result in serial interrupt being disabled, but I have only
 	  seen the symptom on SAMA5 (2013-8-13).
-
+	* includes/nuttx/usb/usbhost.h and many other affected files:  Separate
+	  wait() and enumerate() methods from struct usbhost_driver_s and move
+	  to new interface, struct usbhost_connection_s.  This is part of the
+	  necessary restructuring of the USB host interface to support multiple
+	  root hub ports (2013-8-13).
diff --git a/Documentation/NuttxPortingGuide.html b/Documentation/NuttxPortingGuide.html
index 71bb5842c70..adfc5d36e9e 100644
--- a/Documentation/NuttxPortingGuide.html
+++ b/Documentation/NuttxPortingGuide.html
@@ -12,7 +12,7 @@
       <h1><big><font color="#3c34ec">
         <i>NuttX RTOS Porting Guide</i>
       </font></big></h1>
-      <p>Last Updated: August 12, 2013</p>
+      <p>Last Updated: August 13, 2013</p>
     </td>
   </tr>
 </table>
@@ -3426,9 +3426,11 @@ extern void up_ledoff(int led);
   </li>
   <li>
     <p>
-      <b><code>struct usbhost_driver_s</code></b>.
-      Each USB host controller driver must implement an instance of <code>struct usbhost_driver_s</code>.
-      This structure is defined in <code>include/nuttx/usb/usbhost.h</code>.
+      <b><code>struct usbhost_driver_s</code> and <code>struct usbhost_connection_s</code></b>.
+      Each USB host controller driver must implement an instance of <code>struct usbhost_driver_s</code> and <code>struct usbhost_connection_s</code>:
+      <code>struct usbhost_driver_s</code> provides the interface between the USB host driver and the USB class driver;
+      <code>struct usbhost_connection_s</code> provides the interface between the USB host driver and platform-specific connection management and device enumeration logoc.
+      These structures are defined in <code>include/nuttx/usb/usbhost.h</code>.
     </p>
     <p>
       <b>Examples</b>:
@@ -3471,7 +3473,7 @@ extern void up_ledoff(int led);
       <ul>
         <li>
           <p>
-            <code>int (*wait)(FAR struct usbhost_driver_s *drvr, FAR const bool *connected);</code>
+            <code>int (*wait)(FAR struct usbhost_connection_s *drvr, FAR const bool *connected);</code>
           </p>
           <p>
             Wait for a device to be connected or disconnected.
@@ -3479,7 +3481,7 @@ extern void up_ledoff(int led);
         </li>
         <li>
           <p>
-            <code>int (*enumerate)(FAR struct usbhost_driver_s *drvr, int rhpndx);</code>
+            <code>int (*enumerate)(FAR struct usbhost_connection_s *drvr, int rhpndx);</code>
           </p>
           <p>
             Enumerate the device connected to a root hub port.
diff --git a/arch/arm/src/lpc17xx/lpc17_usbhost.c b/arch/arm/src/lpc17xx/lpc17_usbhost.c
index fbf2b214d2a..11ec7fdc069 100644
--- a/arch/arm/src/lpc17xx/lpc17_usbhost.c
+++ b/arch/arm/src/lpc17xx/lpc17_usbhost.c
@@ -294,8 +294,9 @@ static int lpc17_usbinterrupt(int irq, FAR void *context);
 
 /* USB host controller operations **********************************************/
 
-static int lpc17_wait(FAR struct usbhost_driver_s *drvr, FAR bool *connected);
-static int lpc17_enumerate(FAR struct usbhost_driver_s *drvr, int rhpndx);
+static int lpc17_wait(FAR struct usbhost_connection_s *conn, FAR bool *connected);
+static int lpc17_enumerate(FAR struct usbhost_connection_s *conn, int rhpndx);
+
 static int lpc17_ep0configure(FAR struct usbhost_driver_s *drvr, uint8_t funcaddr,
                               uint16_t maxpacketsize);
 static int lpc17_epalloc(FAR struct usbhost_driver_s *drvr,
@@ -334,8 +335,6 @@ static struct lpc17_usbhost_s g_usbhost =
 {
   .drvr             =
     {
-      .wait         = lpc17_wait,
-      .enumerate    = lpc17_enumerate,
       .ep0configure = lpc17_ep0configure,
       .epalloc      = lpc17_epalloc,
       .epfree       = lpc17_epfree,
@@ -351,6 +350,14 @@ static struct lpc17_usbhost_s g_usbhost =
   .class            = NULL,
 };
 
+/* This is the connection/enumeration interact */
+
+static struct usbhost_connection_s g_usbconn =
+{
+  .wait             = lpc17_wait,
+  .enumerate        = lpc17_enumerate,
+};
+
 /* This is a free list of EDs and TD buffers */
 
 static struct lpc17_list_s *g_edfree; /* List of unused EDs */
@@ -1516,8 +1523,8 @@ static int lpc17_usbinterrupt(int irq, FAR void *context)
  *   Wait for a device to be connected or disconneced.
  *
  * Input Parameters:
- *   drvr - The USB host driver instance obtained as a parameter from the call to
- *      the class create() method.
+ *   conn - The USB host connection instance obtained as a parameter from the call to
+ *      the USB driver initialization logic.
  *   connected - A pointer to a boolean value:  TRUE: Wait for device to be
  *      connected; FALSE: wait for device to be disconnected
  *
@@ -1533,9 +1540,9 @@ static int lpc17_usbinterrupt(int irq, FAR void *context)
  *
  *******************************************************************************/
 
-static int lpc17_wait(FAR struct usbhost_driver_s *drvr, FAR bool *connected)
+static int lpc17_wait(FAR struct usbhost_connection_s *conn, FAR bool *connected)
 {
-  struct lpc17_usbhost_s *priv = (struct lpc17_usbhost_s *)drvr;
+  struct lpc17_usbhost_s *priv = (struct lpc17_usbhost_s *)&g_usbhost;
   irqstate_t flags;
 
   /* Are we already connected? */
@@ -1569,8 +1576,8 @@ static int lpc17_wait(FAR struct usbhost_driver_s *drvr, FAR bool *connected)
  *   charge of the sequence of operations.
  *
  * Input Parameters:
- *   drvr - The USB host driver instance obtained as a parameter from the call to
- *      the class create() method.
+ *   conn - The USB host connection instance obtained as a parameter from the call to
+ *      the USB driver initialization logic.
  *   rphndx - Root hub port index.  0-(n-1) corresponds to root hub port 1-n.
  *
  * Returned Values:
@@ -1584,9 +1591,9 @@ static int lpc17_wait(FAR struct usbhost_driver_s *drvr, FAR bool *connected)
  *
  *******************************************************************************/
 
-static int lpc17_enumerate(FAR struct usbhost_driver_s *drvr, int rphndx)
+static int lpc17_enumerate(FAR struct usbhost_connection_s *conn, int rphndx)
 {
-  struct lpc17_usbhost_s *priv = (struct lpc17_usbhost_s *)drvr;
+  struct lpc17_usbhost_s *priv = (struct lpc17_usbhost_s *)&g_usbhost;
   DEBUGASSERT(priv && rhpndx == 0);
 
   /* Are we connected to a device?  The caller should have called the wait()
@@ -2479,7 +2486,7 @@ static inline void lpc17_ep0init(struct lpc17_usbhost_s *priv)
  *
  *******************************************************************************/
 
-FAR struct usbhost_driver_s *usbhost_initialize(int controller)
+FAR struct usbhost_connection_s *usbhost_initialize(int controller)
 {
   struct lpc17_usbhost_s *priv = &g_usbhost;
   uint32_t regval;
@@ -2707,5 +2714,5 @@ FAR struct usbhost_driver_s *usbhost_initialize(int controller)
   udbg("USB host Initialized, Device connected:%s\n",
        priv->connected ? "YES" : "NO");
 
-  return &priv->drvr;
+  return &g_usbconn;
 }
diff --git a/arch/arm/src/lpc17xx/lpc17_usbhost.h b/arch/arm/src/lpc17xx/lpc17_usbhost.h
index d473db9a6b2..715d6976ffb 100644
--- a/arch/arm/src/lpc17xx/lpc17_usbhost.h
+++ b/arch/arm/src/lpc17xx/lpc17_usbhost.h
@@ -93,8 +93,8 @@ extern "C"
  *******************************************************************************/
 
 #ifdef CONFIG_USBHOST
-struct usbhost_driver_s;
-FAR struct usbhost_driver_s *usbhost_initialize(int controller);
+struct usbhost_connection_s;
+FAR struct usbhost_connection_s *usbhost_initialize(int controller);
 #endif
 
 #undef EXTERN
diff --git a/arch/arm/src/sama5/sam_ohci.c b/arch/arm/src/sama5/sam_ohci.c
index ff45f7bb05d..c5a46f59712 100644
--- a/arch/arm/src/sama5/sam_ohci.c
+++ b/arch/arm/src/sama5/sam_ohci.c
@@ -351,8 +351,9 @@ static int sam_ohci_interrupt(int irq, FAR void *context);
 
 /* USB host controller operations **********************************************/
 
-static int sam_wait(FAR struct usbhost_driver_s *drvr, FAR const bool *connected);
-static int sam_enumerate(FAR struct usbhost_driver_s *drvr, int rhpndx);
+static int sam_wait(FAR struct usbhost_connection_s *conn, FAR const bool *connected);
+static int sam_enumerate(FAR struct usbhost_connection_s *conn, int rhpndx);
+
 static int sam_ep0configure(FAR struct usbhost_driver_s *drvr, uint8_t funcaddr,
                             uint16_t maxpacketsize);
 static int sam_epalloc(FAR struct usbhost_driver_s *drvr,
@@ -391,8 +392,6 @@ static struct sam_ohci_s g_usbhost =
 {
   .drvr             =
     {
-      .wait         = sam_wait,
-      .enumerate    = sam_enumerate,
       .ep0configure = sam_ep0configure,
       .epalloc      = sam_epalloc,
       .epfree       = sam_epfree,
@@ -407,6 +406,14 @@ static struct sam_ohci_s g_usbhost =
     },
 };
 
+/* This is the connection/enumeration interact */
+
+static struct usbhost_connection_s g_usbconn =
+{
+  .wait             = sam_wait,
+  .enumerate        = sam_enumerate,
+};
+
 /* This is a free list of EDs and TD buffers */
 
 static struct sam_list_s *g_edfree; /* List of unused EDs */
@@ -1630,8 +1637,8 @@ static int sam_ohci_interrupt(int irq, FAR void *context)
  *   Wait for a device to be connected or disconnected to/from a root hub port.
  *
  * Input Parameters:
- *   drvr - The USB host driver instance obtained as a parameter from the call
- *      to the class create() method.
+ *   conn - The USB host connection instance obtained as a parameter from the call to
+ *      the USB driver initialization logic.
  *   connected - A pointer to an array of 3 boolean values corresponding to
  *      root hubs 1, 2, and 3.  For each boolean value: TRUE: Wait for a device
  *      to be connected on the root hub; FALSE: wait for device to be
@@ -1651,9 +1658,10 @@ static int sam_ohci_interrupt(int irq, FAR void *context)
  *
  *******************************************************************************/
 
-static int sam_wait(FAR struct usbhost_driver_s *drvr, FAR const bool *connected)
+static int sam_wait(FAR struct usbhost_connection_s *conn,
+                    FAR const bool *connected)
 {
-  struct sam_ohci_s *priv = (struct sam_ohci_s *)drvr;
+  struct sam_ohci_s *priv = &g_usbhost;
   irqstate_t flags;
   int rhpndx;
 
@@ -1707,8 +1715,8 @@ static int sam_wait(FAR struct usbhost_driver_s *drvr, FAR const bool *connected
  *   charge of the sequence of operations.
  *
  * Input Parameters:
- *   drvr - The USB host driver instance obtained as a parameter from the call to
- *      the class create() method.
+ *   conn - The USB host connection instance obtained as a parameter from the call to
+ *      the USB driver initialization logic.
  *   rphndx - Root hub port index.  0-(n-1) corresponds to root hub port 1-n.
  *
  * Returned Values:
@@ -1722,9 +1730,9 @@ static int sam_wait(FAR struct usbhost_driver_s *drvr, FAR const bool *connected
  *
  *******************************************************************************/
 
-static int sam_enumerate(FAR struct usbhost_driver_s *drvr, int rhpndx)
+static int sam_enumerate(FAR struct usbhost_connection_s *conn, int rhpndx)
 {
-  struct sam_ohci_s *priv = (struct sam_ohci_s *)drvr;
+  struct sam_ohci_s *priv = &g_usbhost;
   struct sam_rhport_s *rhport;
   uint32_t regaddr;
 
@@ -2734,5 +2742,5 @@ FAR struct usbhost_driver_s *sam_ohci_initialize(int controller)
   up_enable_irq(SAM_IRQ_UHPHS); /* enable USB interrupt */
   uvdbg("USB OHCI Initialized\n");
 
-  return &priv->drvr;
+  return &g_usbconn;
 }
diff --git a/arch/arm/src/sama5/sam_usbhost.h b/arch/arm/src/sama5/sam_usbhost.h
index c64664daf0f..deb428ce20e 100644
--- a/arch/arm/src/sama5/sam_usbhost.h
+++ b/arch/arm/src/sama5/sam_usbhost.h
@@ -107,8 +107,8 @@ extern "C"
  *******************************************************************************/
 
 #ifdef CONFIG_SAMA5_OHCI
-struct usbhost_driver_s;
-FAR struct usbhost_driver_s *sam_ohci_initialize(int controller);
+struct usbhost_connection_s;
+FAR struct usbhost_connection_s *sam_ohci_initialize(int controller);
 #endif
 
 /*******************************************************************************
diff --git a/arch/arm/src/stm32/stm32_otgfs.h b/arch/arm/src/stm32/stm32_otgfs.h
index 8215256fd89..673b88503b4 100644
--- a/arch/arm/src/stm32/stm32_otgfs.h
+++ b/arch/arm/src/stm32/stm32_otgfs.h
@@ -99,8 +99,8 @@ extern "C"
  *******************************************************************************/
 
 #ifdef CONFIG_USBHOST
-struct usbhost_driver_s;
-FAR struct usbhost_driver_s *stm32_otgfshost_initialize(int controller);
+struct usbhost_connection_s;
+FAR struct usbhost_connection_s *stm32_otgfshost_initialize(int controller);
 #endif
 
 /************************************************************************************
diff --git a/arch/arm/src/stm32/stm32_otgfshost.c b/arch/arm/src/stm32/stm32_otgfshost.c
index 475cd710fbe..25eb2e8469c 100644
--- a/arch/arm/src/stm32/stm32_otgfshost.c
+++ b/arch/arm/src/stm32/stm32_otgfshost.c
@@ -358,8 +358,9 @@ static void stm32_txfe_enable(FAR struct stm32_usbhost_s *priv, int chidx);
 
 /* USB host controller operations **********************************************/
 
-static int stm32_wait(FAR struct usbhost_driver_s *drvr, FAR bool *connected);
-static int stm32_enumerate(FAR struct usbhost_driver_s *drvr, int rhpndx);
+static int stm32_wait(FAR struct usbhost_connection_s *conn, FAR bool *connected);
+static int stm32_enumerate(FAR struct usbhost_connection_s *conn, int rhpndx);
+
 static int stm32_ep0configure(FAR struct usbhost_driver_s *drvr, uint8_t funcaddr,
                               uint16_t maxpacketsize);
 static int stm32_epalloc(FAR struct usbhost_driver_s *drvr,
@@ -406,8 +407,6 @@ static struct stm32_usbhost_s g_usbhost =
 {
   .drvr             =
     {
-      .wait         = stm32_wait,
-      .enumerate    = stm32_enumerate,
       .ep0configure = stm32_ep0configure,
       .epalloc      = stm32_epalloc,
       .epfree       = stm32_epfree,
@@ -423,6 +422,14 @@ static struct stm32_usbhost_s g_usbhost =
   .class            = NULL,
 };
 
+/* This is the connection/enumeration interact */
+
+static struct usbhost_connection_s g_usbconn =
+{
+  .wait             = stm32_wait,
+  .enumerate        = stm32_enumerate,
+};
+
 /*******************************************************************************
  * Public Data
  *******************************************************************************/
@@ -3011,8 +3018,8 @@ static void stm32_txfe_enable(FAR struct stm32_usbhost_s *priv, int chidx)
  *   Wait for a device to be connected or disconneced.
  *
  * Input Parameters:
- *   drvr - The USB host driver instance obtained as a parameter from the call to
- *      the class create() method.
+ *   conn - The USB host connection instance obtained as a parameter from the call to
+ *      the USB driver initialization logic.
  *   connected - A pointer to a boolean value.  TRUE: Wait for device to be
  *      connected; FALSE: wait for device to be disconnected
  *
@@ -3028,9 +3035,9 @@ static void stm32_txfe_enable(FAR struct stm32_usbhost_s *priv, int chidx)
  *
  *******************************************************************************/
 
-static int stm32_wait(FAR struct usbhost_driver_s *drvr, FAR bool *connected)
+static int stm32_wait(FAR struct usbhost_connection_s *conn, FAR bool *connected)
 {
-  FAR struct stm32_usbhost_s *priv = (FAR struct stm32_usbhost_s *)drvr;
+  FAR struct stm32_usbhost_s *priv = &g_usbhost;
   irqstate_t flags;
 
   /* Are we already connected? */
@@ -3064,8 +3071,8 @@ static int stm32_wait(FAR struct usbhost_driver_s *drvr, FAR bool *connected)
  *   charge of the sequence of operations.
  *
  * Input Parameters:
- *   drvr - The USB host driver instance obtained as a parameter from the call to
- *      the class create() method.
+ *   conn - The USB host connection instance obtained as a parameter from the call to
+ *      the USB driver initialization logic.
  *   rphndx - Root hub port index.  0-(n-1) corresponds to root hub port 1-n.
  *
  * Returned Values:
@@ -3079,9 +3086,9 @@ static int stm32_wait(FAR struct usbhost_driver_s *drvr, FAR bool *connected)
  *
  *******************************************************************************/
 
-static int stm32_enumerate(FAR struct usbhost_driver_s *drvr, int rhpndx)
+static int stm32_enumerate(FAR struct usbhost_connection_s *conn, int rhpndx)
 {
-  struct stm32_usbhost_s *priv = (struct stm32_usbhost_s *)drvr;
+  FAR struct stm32_usbhost_s *priv = &g_usbhost;
   uint32_t regval;
   int chidx;
   int ret;
@@ -4222,7 +4229,7 @@ static inline int stm32_hw_initialize(FAR struct stm32_usbhost_s *priv)
  *
  *******************************************************************************/
 
-FAR struct usbhost_driver_s *stm32_otgfshost_initialize(int controller)
+FAR struct usbhost_connection_s *stm32_otgfshost_initialize(int controller)
 {
   /* At present, there is only support for a single OTG FS host. Hence it is
    * pre-allocated as g_usbhost.  However, in most code, the private data
@@ -4296,7 +4303,7 @@ FAR struct usbhost_driver_s *stm32_otgfshost_initialize(int controller)
   /* Enable interrupts at the interrupt controller */
 
   up_enable_irq(STM32_IRQ_OTGFS);
-  return &priv->drvr;
+  return &g_usbconn;
 }
 
 #endif /* CONFIG_USBHOST && CONFIG_STM32_OTGFS */
diff --git a/configs/cloudctrl/src/up_usb.c b/configs/cloudctrl/src/up_usb.c
index 2407285c542..2ef928c14f1 100644
--- a/configs/cloudctrl/src/up_usb.c
+++ b/configs/cloudctrl/src/up_usb.c
@@ -83,7 +83,7 @@
  ************************************************************************************/
 
 #ifdef CONFIG_USBHOST
-static struct usbhost_driver_s *g_drvr;
+static struct usbhost_connection_s *g_usbconn;
 #endif
 
 /************************************************************************************
@@ -109,7 +109,7 @@ static int usbhost_waiter(int argc, char *argv[])
     {
       /* Wait for the device to change state */
 
-      ret = DRVR_WAIT(g_drvr, &connected);
+      ret = CONN_WAIT(g_usbconn, &connected);
       DEBUGASSERT(ret == OK);
 
       connected = !connected;
@@ -121,7 +121,7 @@ static int usbhost_waiter(int argc, char *argv[])
         {
           /* Yes.. enumerate the newly connected device */
 
-          (void)DRVR_ENUMERATE(g_drvr, 0);
+          (void)CONN_ENUMERATE(g_usbconn, 0);
         }
     }
 
@@ -187,8 +187,8 @@ int stm32_usbhost_initialize(void)
   /* Then get an instance of the USB host interface */
 
   uvdbg("Initialize USB host\n");
-  g_drvr = stm32_otgfshost_initialize(0);
-  if (g_drvr)
+  g_usbconn = stm32_otgfshost_initialize(0);
+  if (g_usbconn)
     {
       /* Start a thread to handle device connection. */
 
diff --git a/configs/mikroe-stm32f4/src/up_usb.c b/configs/mikroe-stm32f4/src/up_usb.c
index cb94e5cbef8..967da72fb43 100644
--- a/configs/mikroe-stm32f4/src/up_usb.c
+++ b/configs/mikroe-stm32f4/src/up_usb.c
@@ -82,7 +82,7 @@
  ************************************************************************************/
 
 #ifdef CONFIG_USBHOST
-static struct usbhost_driver_s *g_drvr;
+static struct usbhost_connection_s *g_usbconn;
 #endif
 
 /************************************************************************************
@@ -108,7 +108,7 @@ static int usbhost_waiter(int argc, char *argv[])
     {
       /* Wait for the device to change state */
 
-      ret = DRVR_WAIT(g_drvr, &connected);
+      ret = CONN_WAIT(g_usbconn, &connected);
       DEBUGASSERT(ret == OK);
 
       connected = !connected;
@@ -120,7 +120,7 @@ static int usbhost_waiter(int argc, char *argv[])
         {
           /* Yes.. enumerate the newly connected device */
 
-          (void)DRVR_ENUMERATE(g_drvr, 0);
+          (void)CONN_ENUMERATE(g_usbconn, 0);
         }
     }
 
@@ -186,8 +186,8 @@ int stm32_usbhost_initialize(void)
   /* Then get an instance of the USB host interface */
 
   uvdbg("Initialize USB host\n");
-  g_drvr = stm32_otgfshost_initialize(0);
-  if (g_drvr)
+  g_usbconn = stm32_otgfshost_initialize(0);
+  if (g_usbconn)
     {
       /* Start a thread to handle device connection. */
 
diff --git a/configs/olimex-lpc1766stk/src/up_nsh.c b/configs/olimex-lpc1766stk/src/up_nsh.c
index e893ba27e08..d74ec7c8a2c 100644
--- a/configs/olimex-lpc1766stk/src/up_nsh.c
+++ b/configs/olimex-lpc1766stk/src/up_nsh.c
@@ -143,7 +143,7 @@
  ****************************************************************************/
 
 #ifdef NSH_HAVEUSBHOST
-static struct usbhost_driver_s *g_drvr;
+static struct usbhost_connection_s *g_usbconn;
 #endif
 
 /****************************************************************************
@@ -169,7 +169,7 @@ static int nsh_waiter(int argc, char *argv[])
     {
       /* Wait for the device to change state */
 
-      ret = DRVR_WAIT(g_drvr, &connected);
+      ret = CONN_WAIT(g_usbconn, &connected);
       DEBUGASSERT(ret == OK);
 
       connected = !connected;
@@ -181,7 +181,7 @@ static int nsh_waiter(int argc, char *argv[])
         {
           /* Yes.. enumerate the newly connected device */
 
-          (void)DRVR_ENUMERATE(g_drvr, 0);
+          (void)CONN_ENUMERATE(g_usbconn, 0);
         }
     }
 
@@ -279,8 +279,8 @@ static int nsh_usbhostinitialize(void)
   /* Then get an instance of the USB host interface */
 
   message("nsh_usbhostinitialize: Initialize USB host\n");
-  g_drvr = usbhost_initialize(0);
-  if (g_drvr)
+  g_usbconn = usbhost_initialize(0);
+  if (g_usbconn)
     {
       /* Start a thread to handle device connection. */
 
diff --git a/configs/open1788/src/lpc17_nsh.c b/configs/open1788/src/lpc17_nsh.c
index fa6e086ed01..a1899501e8c 100644
--- a/configs/open1788/src/lpc17_nsh.c
+++ b/configs/open1788/src/lpc17_nsh.c
@@ -164,7 +164,7 @@
  ****************************************************************************/
 
 #ifdef NSH_HAVE_USBHOST
-static struct usbhost_driver_s *g_drvr;
+static struct usbhost_connection_s *g_usbconn;
 #endif
 #ifdef NSH_HAVE_MMCSD
 static FAR struct sdio_dev_s *g_sdiodev;
@@ -193,7 +193,7 @@ static int nsh_waiter(int argc, char *argv[])
     {
       /* Wait for the device to change state */
 
-      ret = DRVR_WAIT(g_drvr, &connected);
+      ret = CONN_WAIT(g_usbconn, &connected);
       DEBUGASSERT(ret == OK);
 
       connected = !connected;
@@ -205,7 +205,7 @@ static int nsh_waiter(int argc, char *argv[])
         {
           /* Yes.. enumerate the newly connected device */
 
-          (void)DRVR_ENUMERATE(g_drvr, 0);
+          (void)CONN_ENUMERATE(g_usbconn, 0);
         }
     }
 
@@ -336,8 +336,8 @@ static int nsh_usbhostinitialize(void)
   /* Then get an instance of the USB host interface */
 
   message("nsh_usbhostinitialize: Initialize USB host\n");
-  g_drvr = usbhost_initialize(0);
-  if (g_drvr)
+  g_usbconn = usbhost_initialize(0);
+  if (g_usbconn)
     {
       /* Start a thread to handle device connection. */
 
diff --git a/configs/pic32-starterkit/src/up_nsh.c b/configs/pic32-starterkit/src/up_nsh.c
index 7c8e214124d..f0731b8f4b0 100644
--- a/configs/pic32-starterkit/src/up_nsh.c
+++ b/configs/pic32-starterkit/src/up_nsh.c
@@ -171,7 +171,7 @@
  ****************************************************************************/
 
 #ifdef NSH_HAVEUSBHOST
-static struct usbhost_driver_s *g_drvr;
+static struct usbhost_connection_s *g_usbconn;
 #endif
 
 /****************************************************************************
@@ -197,7 +197,7 @@ static int nsh_waiter(int argc, char *argv[])
     {
       /* Wait for the device to change state */
 
-      ret = DRVR_WAIT(g_drvr, &connected);
+      ret = CONN_WAIT(g_usbconn, &connected);
       DEBUGASSERT(ret == OK);
 
       connected = !connected;
@@ -209,7 +209,7 @@ static int nsh_waiter(int argc, char *argv[])
         {
           /* Yes.. enumerate the newly connected device */
 
-          (void)DRVR_ENUMERATE(g_drvr, 0);
+          (void)CONN_ENUMERATE(g_usbconn, 0);
         }
     }
 
@@ -300,8 +300,8 @@ static int nsh_usbhostinitialize(void)
   /* Then get an instance of the USB host interface */
 
   message("nsh_usbhostinitialize: Initialize USB host\n");
-  g_drvr = usbhost_initialize(0);
-  if (g_drvr)
+  g_usbconn = usbhost_initialize(0);
+  if (g_usbconn)
     {
       /* Start a thread to handle device connection. */
 
diff --git a/configs/pic32mx7mmb/src/up_nsh.c b/configs/pic32mx7mmb/src/up_nsh.c
index 5e59af56452..5647702fca7 100644
--- a/configs/pic32mx7mmb/src/up_nsh.c
+++ b/configs/pic32mx7mmb/src/up_nsh.c
@@ -170,7 +170,7 @@
  ****************************************************************************/
 
 #ifdef NSH_HAVEUSBHOST
-static struct usbhost_driver_s *g_drvr;
+static struct usbhost_connection_s *g_usbconn;
 #endif
 
 /****************************************************************************
@@ -196,7 +196,7 @@ static int nsh_waiter(int argc, char *argv[])
     {
       /* Wait for the device to change state */
 
-      ret = DRVR_WAIT(g_drvr, &connected);
+      ret = CONN_WAIT(g_usbconn, &connected);
       DEBUGASSERT(ret == OK);
 
       connected = !connected;
@@ -208,7 +208,7 @@ static int nsh_waiter(int argc, char *argv[])
         {
           /* Yes.. enumerate the newly connected device */
 
-          (void)DRVR_ENUMERATE(g_drvr, 0);
+          (void)CONN_ENUMERATE(g_usbconn, 0);
         }
     }
 
@@ -308,8 +308,8 @@ static int nsh_usbhostinitialize(void)
   /* Then get an instance of the USB host interface */
 
   message("nsh_usbhostinitialize: Initialize USB host\n");
-  g_drvr = usbhost_initialize(0);
-  if (g_drvr)
+  g_usbconn = usbhost_initialize(0);
+  if (g_usbconn)
     {
       /* Start a thread to handle device connection. */
 
diff --git a/configs/sama5d3x-ek/src/sam_usb.c b/configs/sama5d3x-ek/src/sam_usb.c
index 3ab5d3c3939..56348c2cf0f 100644
--- a/configs/sama5d3x-ek/src/sam_usb.c
+++ b/configs/sama5d3x-ek/src/sam_usb.c
@@ -77,10 +77,10 @@
 /* Retained device driver handles */
 
 #ifdef CONFIG_SAMA5_OHCI
-static struct usbhost_driver_s *g_ohci;
+static struct usbhost_connection_s *g_ohciconn;
 #endif
 #ifdef CONFIG_SAMA5_EHCI
-static struct usbhost_driver_s *g_ehci;
+static struct usbhost_connection_s *g_ehciconn;
 #endif
 
 /************************************************************************************
@@ -96,7 +96,7 @@ static struct usbhost_driver_s *g_ehci;
  ************************************************************************************/
 
 #if HAVE_USBHOST
-static int usbhost_waiter(struct usbhost_driver_s *dev)
+static int usbhost_waiter(struct usbhost_connection_s *dev)
 {
   bool connected[SAM_USBHOST_NRHPORT] = {false, false, false};
   int rhpndx;
@@ -106,7 +106,7 @@ static int usbhost_waiter(struct usbhost_driver_s *dev)
     {
       /* Wait for the device to change state */
 
-      rhpndx = DRVR_WAIT(dev, connected);
+      rhpndx = CONN_WAIT(dev, connected);
       DEBUGASSERT(rhpndx >= 0 && rhpndx < SAM_USBHOST_NRHPORT);
 
       connected[rhpndx] = !connected[rhpndx];
@@ -120,7 +120,7 @@ static int usbhost_waiter(struct usbhost_driver_s *dev)
         {
           /* Yes.. enumerate the newly connected device */
 
-          (void)DRVR_ENUMERATE(dev, rhpndx);
+          (void)CONN_ENUMERATE(dev, rhpndx);
         }
     }
 
@@ -141,7 +141,7 @@ static int usbhost_waiter(struct usbhost_driver_s *dev)
 #ifdef CONFIG_SAMA5_OHCI
 static int ohci_waiter(int argc, char *argv[])
 {
-  return usbhost_waiter(g_ohci);
+  return usbhost_waiter(g_ohciconn);
 }
 #endif
 
@@ -156,7 +156,7 @@ static int ohci_waiter(int argc, char *argv[])
 #ifdef CONFIG_SAMA5_EHCI
 static int ehci_waiter(int argc, char *argv[])
 {
-  return usbhost_waiter(g_ehci);
+  return usbhost_waiter(g_ehciconn);
 }
 #endif
 
@@ -287,8 +287,8 @@ int sam_usbhost_initialize(void)
 #ifdef CONFIG_SAMA5_OHCI
   /* Get an instance of the USB OHCI interface */
 
-  g_ohci = sam_ohci_initialize(0);
-  if (!g_ohci)
+  g_ohciconn = sam_ohci_initialize(0);
+  if (!g_ohciconn)
     {
       udbg("ERROR: sam_ohci_initialize failed\n");
       return -ENODEV;
@@ -308,8 +308,8 @@ int sam_usbhost_initialize(void)
 #ifdef CONFIG_SAMA5_EHCI
   /* Get an instance of the USB EHCI interface */
 
-  g_ehci = sam_ehci_initialize(0);
-  if (!g_ehci)
+  g_ehciconn = sam_ehci_initialize(0);
+  if (!g_ehciconn)
     {
       udbg("ERROR: sam_ehci_initialize failed\n");
       return -ENODEV;
diff --git a/configs/shenzhou/src/up_usb.c b/configs/shenzhou/src/up_usb.c
index 88f6d96baf8..95e3a3c39c0 100644
--- a/configs/shenzhou/src/up_usb.c
+++ b/configs/shenzhou/src/up_usb.c
@@ -82,7 +82,7 @@
  ************************************************************************************/
 
 #ifdef CONFIG_USBHOST
-static struct usbhost_driver_s *g_drvr;
+static struct usbhost_connection_s *g_usbconn;
 #endif
 
 /************************************************************************************
@@ -108,7 +108,7 @@ static int usbhost_waiter(int argc, char *argv[])
     {
       /* Wait for the device to change state */
 
-      ret = DRVR_WAIT(g_drvr, &connected);
+      ret = CONN_WAIT(g_usbconn, &connected);
       DEBUGASSERT(ret == OK);
 
       connected = !connected;
@@ -120,7 +120,7 @@ static int usbhost_waiter(int argc, char *argv[])
         {
           /* Yes.. enumerate the newly connected device */
 
-          (void)DRVR_ENUMERATE(g_drvr, 0);
+          (void)CONN_ENUMERATE(g_usbconn, 0);
         }
     }
 
@@ -186,8 +186,8 @@ int stm32_usbhost_initialize(void)
   /* Then get an instance of the USB host interface */
 
   uvdbg("Initialize USB host\n");
-  g_drvr = stm32_otgfshost_initialize(0);
-  if (g_drvr)
+  g_usbconn = stm32_otgfshost_initialize(0);
+  if (g_usbconn)
     {
       /* Start a thread to handle device connection. */
 
diff --git a/configs/stm3220g-eval/src/up_usb.c b/configs/stm3220g-eval/src/up_usb.c
index 4de02df9643..72187d00911 100644
--- a/configs/stm3220g-eval/src/up_usb.c
+++ b/configs/stm3220g-eval/src/up_usb.c
@@ -82,7 +82,7 @@
  ************************************************************************************/
 
 #ifdef CONFIG_USBHOST
-static struct usbhost_driver_s *g_drvr;
+static struct usbhost_connection_s *g_usbconn;
 #endif
 
 /************************************************************************************
@@ -108,7 +108,7 @@ static int usbhost_waiter(int argc, char *argv[])
     {
       /* Wait for the device to change state */
 
-      ret = DRVR_WAIT(g_drvr, &connected);
+      ret = CONN_WAIT(g_usbconn, &connected);
       DEBUGASSERT(ret == OK);
 
       connected = !connected;
@@ -120,7 +120,7 @@ static int usbhost_waiter(int argc, char *argv[])
         {
           /* Yes.. enumerate the newly connected device */
 
-          (void)DRVR_ENUMERATE(g_drvr, 0);
+          (void)CONN_ENUMERATE(g_usbconn, 0);
         }
     }
 
@@ -186,8 +186,8 @@ int stm32_usbhost_initialize(void)
   /* Then get an instance of the USB host interface */
 
   uvdbg("Initialize USB host\n");
-  g_drvr = stm32_otgfshost_initialize(0);
-  if (g_drvr)
+  g_usbconn = stm32_otgfshost_initialize(0);
+  if (g_usbconn)
     {
       /* Start a thread to handle device connection. */
 
diff --git a/configs/stm3240g-eval/src/up_usb.c b/configs/stm3240g-eval/src/up_usb.c
index c69a017bbd2..d27ac37351b 100644
--- a/configs/stm3240g-eval/src/up_usb.c
+++ b/configs/stm3240g-eval/src/up_usb.c
@@ -82,7 +82,7 @@
  ************************************************************************************/
 
 #ifdef CONFIG_USBHOST
-static struct usbhost_driver_s *g_drvr;
+static struct usbhost_connection_s *g_usbconn;
 #endif
 
 /************************************************************************************
@@ -108,7 +108,7 @@ static int usbhost_waiter(int argc, char *argv[])
     {
       /* Wait for the device to change state */
 
-      ret = DRVR_WAIT(g_drvr, &connected);
+      ret = CONN_WAIT(g_usbconn, &connected);
       DEBUGASSERT(ret == OK);
 
       connected = !connected;
@@ -120,7 +120,7 @@ static int usbhost_waiter(int argc, char *argv[])
         {
           /* Yes.. enumerate the newly connected device */
 
-          (void)DRVR_ENUMERATE(g_drvr, 0);
+          (void)CONN_ENUMERATE(g_usbconn, 0);
         }
     }
 
@@ -186,8 +186,8 @@ int stm32_usbhost_initialize(void)
   /* Then get an instance of the USB host interface */
 
   uvdbg("Initialize USB host\n");
-  g_drvr = stm32_otgfshost_initialize(0);
-  if (g_drvr)
+  g_usbconn = stm32_otgfshost_initialize(0);
+  if (g_usbconn)
     {
       /* Start a thread to handle device connection. */
 
diff --git a/configs/stm32f4discovery/src/up_usb.c b/configs/stm32f4discovery/src/up_usb.c
index 166f4e7a97c..2ac9b62711f 100644
--- a/configs/stm32f4discovery/src/up_usb.c
+++ b/configs/stm32f4discovery/src/up_usb.c
@@ -82,7 +82,7 @@
  ************************************************************************************/
 
 #ifdef CONFIG_USBHOST
-static struct usbhost_driver_s *g_drvr;
+static struct usbhost_connection_s *g_usbconn;
 #endif
 
 /************************************************************************************
@@ -108,7 +108,7 @@ static int usbhost_waiter(int argc, char *argv[])
     {
       /* Wait for the device to change state */
 
-      ret = DRVR_WAIT(g_drvr, &connected);
+      ret = CONN_WAIT(g_usbconn, &connected);
       DEBUGASSERT(ret == OK);
 
       connected = !connected;
@@ -120,7 +120,7 @@ static int usbhost_waiter(int argc, char *argv[])
         {
           /* Yes.. enumerate the newly connected device */
 
-          (void)DRVR_ENUMERATE(g_drvr, 0);
+          (void)CONN_ENUMERATE(g_usbconn, 0);
         }
     }
 
@@ -186,8 +186,8 @@ int stm32_usbhost_initialize(void)
   /* Then get an instance of the USB host interface */
 
   uvdbg("Initialize USB host\n");
-  g_drvr = stm32_otgfshost_initialize(0);
-  if (g_drvr)
+  g_usbconn = stm32_otgfshost_initialize(0);
+  if (g_usbconn)
     {
       /* Start a thread to handle device connection. */
 
diff --git a/configs/sure-pic32mx/src/pic32mx_nsh.c b/configs/sure-pic32mx/src/pic32mx_nsh.c
index b9ea90dba42..f36830fcbc5 100644
--- a/configs/sure-pic32mx/src/pic32mx_nsh.c
+++ b/configs/sure-pic32mx/src/pic32mx_nsh.c
@@ -162,7 +162,7 @@
  ****************************************************************************/
 
 #ifdef NSH_HAVE_USBHOST
-static struct usbhost_driver_s *g_drvr;
+static struct usbhost_connection_s *g_usbconn;
 #endif
 
 /****************************************************************************
@@ -188,7 +188,7 @@ static int nsh_waiter(int argc, char *argv[])
     {
       /* Wait for the device to change state */
 
-      ret = DRVR_WAIT(g_drvr, &connected);
+      ret = CONN_WAIT(g_usbconn, &connected);
       DEBUGASSERT(ret == OK);
 
       connected = !connected;
@@ -200,7 +200,7 @@ static int nsh_waiter(int argc, char *argv[])
         {
           /* Yes.. enumerate the newly connected device */
 
-          (void)DRVR_ENUMERATE(g_drvr, 0);
+          (void)CONN_ENUMERATE(g_usbconn, 0);
         }
     }
 
@@ -300,8 +300,8 @@ static int nsh_usbhostinitialize(void)
   /* Then get an instance of the USB host interface */
 
   message("nsh_usbhostinitialize: Initialize USB host\n");
-  g_drvr = usbhost_initialize(0);
-  if (g_drvr)
+  g_usbconn = usbhost_initialize(0);
+  if (g_usbconn)
     {
       /* Start a thread to handle device connection. */
 
diff --git a/include/nuttx/usb/usbhost.h b/include/nuttx/usb/usbhost.h
index d357e0b9bf9..937bc77696e 100644
--- a/include/nuttx/usb/usbhost.h
+++ b/include/nuttx/usb/usbhost.h
@@ -152,14 +152,14 @@
 #define CLASS_DISCONNECTED(class) ((class)->disconnected(class))
 
 /*******************************************************************************
- * Name: DRVR_WAIT
+ * Name: CONN_WAIT
  *
  * Description:
  *   Wait for a device to be connected or disconnected to/from a root hub port.
  *
  * Input Parameters:
- *   drvr - The USB host driver instance obtained as a parameter from the call
- *      to the class create() method.
+ *   conn - The USB host connection instance obtained as a parameter from the call to
+ *      the USB driver initialization logic.
  *   connected - A pointer to an array of n boolean values corresponding to
  *      root hubs 1 through n.  For each boolean value: TRUE: Wait for a device
  *      to be connected on the root hub; FALSE: wait for device to be
@@ -178,10 +178,10 @@
  *
  *******************************************************************************/
 
-#define DRVR_WAIT(drvr, connected) ((drvr)->wait(drvr,connected))
+#define CONN_WAIT(conn, connected) ((conn)->wait(conn,connected))
 
 /************************************************************************************
- * Name: DRVR_ENUMERATE
+ * Name: CONN_ENUMERATE
  *
  * Description:
  *   Enumerate the connected device.  As part of this enumeration process,
@@ -194,8 +194,8 @@
  *   charge of the sequence of operations.
  *
  * Input Parameters:
- *   drvr - The USB host driver instance obtained as a parameter from the call to
- *      the class create() method.
+ *   conn - The USB host connection instance obtained as a parameter from the call to
+ *      the USB driver initialization logic.
  *   rphndx - Root hub port index.  0-(n-1) corresponds to root hub port 1-n.
  *
  * Returned Values:
@@ -207,7 +207,7 @@
  *
  ************************************************************************************/
 
-#define DRVR_ENUMERATE(drvr,rhpndx) ((drvr)->enumerate(drvr,rhpndx))
+#define CONN_ENUMERATE(conn,rhpndx) ((conn)->enumerate(conn,rhpndx))
 
 /************************************************************************************
  * Name: DRVR_EP0CONFIGURE
@@ -586,15 +586,16 @@ struct usbhost_epdesc_s
 
 typedef FAR void *usbhost_ep_t;
 
-/* struct usbhost_driver_s provides access to the USB host driver from the
- * USB host class implementation.
+/* struct usbhost_connection_s provides as interface between platform-specific
+ * connection monitoring and the USB host driver connectin and enumeration
+ * logic.
  */
 
-struct usbhost_driver_s
+struct usbhost_connection_s
 {
   /* Wait for a device to connect or disconnect. */
 
-  int (*wait)(FAR struct usbhost_driver_s *drvr, FAR const bool *connected);
+  int (*wait)(FAR struct usbhost_connection_s *drvr, FAR const bool *connected);
 
   /* Enumerate the device connected on a root hub port.  As part of this
    * enumeration process, the driver will (1) get the device's configuration
@@ -606,8 +607,15 @@ struct usbhost_driver_s
    * in charge of the sequence of operations.
    */
 
-  int (*enumerate)(FAR struct usbhost_driver_s *drvr, int rhpndx);
+  int (*enumerate)(FAR struct usbhost_connection_s *drvr, int rhpndx);
+};
 
+/* struct usbhost_driver_s provides access to the USB host driver from the
+ * USB host class implementation.
+ */
+
+struct usbhost_driver_s
+{
   /* Configure endpoint 0.  This method is normally used internally by the
    * enumerate() method but is made available at the interface to support
    * an external implementation of the enumeration logic.