SAMA5: Add support for initialization of the USB host and mass storage class

configs/sama5d3x-ek/src/Makefile

@@ -78,6 +78,14 @@ CSRCS += sam_hsmci.c
 endif
 endif
 
+ifeq ($(CONFIG_SAMA5_UHPHS),y)
+CSRCS += sam_usb.c
+else
+ifeq ($(CONFIG_SAMA5_UDPHS),y)
+CSRCS += sam_usb.c
+endif
+endif
+
 ifeq ($(CONFIG_NSH_ARCHINIT),y)
 CSRCS += sam_nsh.c
 endif

configs/sama5d3x-ek/src/sam_boot.c

@@ -90,6 +90,19 @@ void sam_boardinitialize(void)
 
 #endif
 
+  /* Initialize USB if the 1) the HS host or device controller is in the
+   * configuration and 2) the weak function sam_usbinitialize() has been brought
+   * into the build. Presumeably either CONFIG_USBDEV or CONFIG_USBHOST is also
+   * selected.
+   */
+
+#if defined(CONFIG_SAMA5_UHPHS) || defined(CONFIG_SAMA5_UDPHS)
+  if (sam_usbinitialize)
+    {
+      sam_usbinitialize();
+    }
+#endif
+
 #ifdef CONFIG_ARCH_LEDS
   /* Configure on-board LEDs if LED support has been selected. */
 

configs/sama5d3x-ek/src/sam_nsh.c

@@ -112,7 +112,7 @@ int nsh_archinitialize(void)
   ret = sam_at25_initialize(AT25_MINOR);
   if (ret < 0)
     {
-      fdbg("ERROR: sam_at25_initialize failed: %d\n", ret);
+      dbg("ERROR: sam_at25_initialize failed: %d\n", ret);
       return ret;
     }
 #endif
@@ -122,8 +122,8 @@ int nsh_archinitialize(void)
   ret = sam_hsmci_initialize(HSMCI0_SLOTNO, HSMCI0_MINOR);
   if (ret < 0)
     {
-      fdbg("ERROR: sam_hsmci_initialize(%d,%d) failed: %d\n",
+      dbg("ERROR: sam_hsmci_initialize(%d,%d) failed: %d\n",
-           HSMCI0_SLOTNO, HSMCI0_MINOR, ret);
+          HSMCI0_SLOTNO, HSMCI0_MINOR, ret);
       return ret;
     }
 #endif
@@ -132,12 +132,25 @@ int nsh_archinitialize(void)
   ret = sam_hsmci_initialize(HSMCI1_SLOTNO, HSMCI1_MINOR);
   if (ret < 0)
     {
-      fdbg("ERROR: sam_hsmci_initialize(%d,%d) failed: %d\n",
+      dbg("ERROR: sam_hsmci_initialize(%d,%d) failed: %d\n",
-           HSMCI1_SLOTNO, HSMCI1_MINOR, ret);
+          HSMCI1_SLOTNO, HSMCI1_MINOR, ret);
       return ret;
     }
 #endif
 #endif
 
+#if defined(CONFIG_SAMA5_OHCI) || defined(CONFIG_SAMA5_EHCI)
+  /* Initialize USB host operation.  sam_usbhost_initialize() starts a thread
+   * will monitor for USB connection and disconnection events.
+   */
+
+  ret = sam_usbhost_initialize();
+  if (ret != OK)
+    {
+      dbg("ERROR: Failed to initialize USB host: %d\n", ret);
+      return ret;
+    }
+#endif
+
   return OK;
 }

configs/sama5d3x-ek/src/sam_usb.c

@@ -0,0 +1,272 @@
+/************************************************************************************
+ * configs/sama5d3x-ek/src/up_usbdev.c
+ *
+ *   Copyright (C) 2013 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 <stdbool.h>
+#include <sched.h>
+#include <errno.h>
+#include <assert.h>
+#include <debug.h>
+
+#include <nuttx/usb/usbdev.h>
+#include <nuttx/usb/usbhost.h>
+#include <nuttx/usb/usbdev_trace.h>
+
+#include "up_arch.h"
+#include "sam_ohci.h"
+#include "sama5d3x-ek.h"
+
+#if defined(CONFIG_SAMA5_UHPHS) || defined(CONFIG_SAMA5_UDPHS)
+
+/************************************************************************************
+ * Pre-processor Definitions
+ ************************************************************************************/
+
+#ifndef CONFIG_USBHOST_DEFPRIO
+#  define CONFIG_USBHOST_DEFPRIO 50
+#endif
+
+#ifndef CONFIG_USBHOST_STACKSIZE
+#  define CONFIG_USBHOST_STACKSIZE 1024
+#endif
+
+/************************************************************************************
+ * Private Data
+ ************************************************************************************/
+
+#if defined(CONFIG_SAMA5_OHCI) || defined(CONFIG_SAMA5_EHCI)
+static struct usbhost_driver_s *g_drvr;
+#endif
+
+/************************************************************************************
+ * Private Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Name: usbhost_waiter
+ *
+ * Description:
+ *   Wait for USB devices to be connected.
+ *
+ ************************************************************************************/
+
+#ifdef CONFIG_USBHOST
+static int usbhost_waiter(int argc, char *argv[])
+{
+  bool connected = false;
+
+  uvdbg("Running\n");
+  for (;;)
+    {
+      /* Wait for the device to change state */
+
+      DEBUGVERIFY(DRVR_WAIT(g_drvr, connected) == OK);
+
+      connected = !connected;
+      uvdbg("%s\n", connected ? "connected" : "disconnected");
+
+      /* Did we just become connected? */
+
+      if (connected)
+        {
+          /* Yes.. enumerate the newly connected device */
+
+          (void)DRVR_ENUMERATE(g_drvr);
+        }
+    }
+
+  /* Keep the compiler from complaining */
+
+  return 0;
+}
+#endif
+
+/************************************************************************************
+ * Public Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Name: sam_usbinitialize
+ *
+ * Description:
+ *   Called from sam_usbinitialize very early in inialization to setup USB-related
+ *   GPIO pins for the STM32F4Discovery board.
+ *
+ ************************************************************************************/
+
+void weak_function sam_usbinitialize(void)
+{
+  /* Configure pull-ups */
+
+  /* Configure the OTG FS VBUS sensing GPIO, Power On, and Overcurrent PIOs */
+}
+
+/***********************************************************************************
+ * Name: sam_usbhost_initialize
+ *
+ * Description:
+ *   Called at application startup time to initialize the USB host functionality.
+ *   This function will start a thread that will monitor for device
+ *   connection/disconnection events.
+ *
+ ***********************************************************************************/
+
+#if defined(CONFIG_SAMA5_OHCI) || defined(CONFIG_SAMA5_EHCI)
+int sam_usbhost_initialize(void)
+{
+  int pid;
+  int ret;
+
+  /* First, register all of the class drivers needed to support the drivers
+   * that we care about:
+   */
+
+  uvdbg("Register class drivers\n");
+  ret = usbhost_storageinit();
+  if (ret != OK)
+    {
+      udbg("Failed to register the mass storage class\n");
+    }
+
+  /* Then get an instance of the USB host interface */
+
+  uvdbg("Initialize USB host\n");
+  g_drvr = sam_ohci_initialize(0);
+  if (g_drvr)
+    {
+      /* Start a thread to handle device connection. */
+
+      uvdbg("Start usbhost_waiter\n");
+
+      pid = TASK_CREATE("usbhost", CONFIG_USBHOST_DEFPRIO,
+                        CONFIG_USBHOST_STACKSIZE,
+                        (main_t)usbhost_waiter, (FAR char * const *)NULL);
+      return pid < 0 ? -ENOEXEC : OK;
+    }
+
+  return -ENODEV;
+}
+#endif
+
+/***********************************************************************************
+ * Name: sam_usbhost_vbusdrive
+ *
+ * Description:
+ *   Enable/disable driving of VBUS 5V output.  This function must be provided be
+ *   each platform that implements the STM32 OTG FS host interface
+ *
+ *   "On-chip 5 V VBUS generation is not supported. For this reason, a charge pump 
+ *    or, if 5 V are available on the application board, a basic power switch, must 
+ *    be added externally to drive the 5 V VBUS line. The external charge pump can 
+ *    be driven by any GPIO output. When the application decides to power on VBUS 
+ *    using the chosen GPIO, it must also set the port power bit in the host port 
+ *    control and status register (PPWR bit in OTG_FS_HPRT).
+ *
+ *   "The application uses this field to control power to this port, and the core 
+ *    clears this bit on an overcurrent condition."
+ *
+ * Input Parameters:
+ *   iface - For future growth to handle multiple USB host interface.  Should be zero.
+ *   enable - true: enable VBUS power; false: disable VBUS power
+ *
+ * Returned Value:
+ *   None
+ *
+ ***********************************************************************************/
+
+#if defined(CONFIG_SAMA5_OHCI) || defined(CONFIG_SAMA5_EHCI)
+void sam_usbhost_vbusdrive(int iface, bool enable)
+{
+  DEBUGASSERT(iface == 0);
+  
+  if (enable)
+    {
+      /* Enable the Power Switch by driving the enable pin low */
+    }
+  else
+    { 
+      /* Disable the Power Switch by driving the enable pin high */
+    }
+}
+#endif
+
+/************************************************************************************
+ * Name: sam_setup_overcurrent
+ *
+ * Description:
+ *   Setup to receive an interrupt-level callback if an overcurrent condition is
+ *   detected.
+ *
+ * Input paramter:
+ *   handler - New overcurrent interrupt handler
+ *
+ * Returned value:
+ *   Old overcurrent interrupt handler
+ *
+ ************************************************************************************/
+
+#if defined(CONFIG_SAMA5_OHCI) || defined(CONFIG_SAMA5_EHCI)
+xcpt_t sam_setup_overcurrent(xcpt_t handler)
+{
+  return NULL;
+}
+#endif
+
+/************************************************************************************
+ * Name:  sam_usbsuspend
+ *
+ * Description:
+ *   Board logic must provide the sam_usbsuspend logic if the USBDEV driver is
+ *   used.  This function is called whenever the USB enters or leaves suspend mode.
+ *   This is an opportunity for the board logic to shutdown clocks, power, etc.
+ *   while the USB is suspended.
+ *
+ ************************************************************************************/
+
+#ifdef CONFIG_USBDEV
+void sam_usbsuspend(FAR struct usbdev_s *dev, bool resume)
+{
+  ulldbg("resume: %d\n", resume);
+}
+#endif
+
+#endif /* CONFIG_SAMA5_UHPHS || CONFIG_SAMA5_UDPHS*/

configs/sama5d3x-ek/src/sama5d3x-ek.h

@@ -58,6 +58,7 @@
 #define HAVE_HSMCI_MTD  1
 #define HAVE_AT25_MTD   1
 
+/* HSMCI */
 /* Can't support MMC/SD if the card interface(s) are not enable */
 
 #if !defined(CONFIG_SAMA5_HSMCI0) && !defined(CONFIG_SAMA5_HSMCI1)
@@ -78,6 +79,7 @@
 #  undef HAVE_HSMCI_MTD
 #endif
 
+/* AT25 Serial FLASH */
 /* Can't support the AT25 device if it SPI0 or AT25 support are not enabled */
 
 #if !defined(CONFIG_SAMA5_SPI0) || !defined(CONFIG_MTD_AT25)
@@ -106,6 +108,39 @@
 #  undef CONFIG_SAMA5_AT25_NXFFS
 #endif
 
+/* USB Host / USB Device */
+/* Either CONFIG_SAMA5_UHPHS or CONFIG_SAMA5_UDPHS must be defined, or there is
+ * no USB of any kind.
+ */
+
+#if !defined(CONFIG_SAMA5_UHPHS)
+#  undef CONFIG_SAMA5_OHCI
+#  undef CONFIG_SAMA5_EHCI
+#endif
+
+#if !defined(CONFIG_SAMA5_UDPHS)
+#endif
+
+/* CONFIG_USBDEV and CONFIG_USBHOST must also be defined */
+
+#if defined(CONFIG_USBDEV)
+#else
+#endif
+
+#if defined(CONFIG_USBHOST)
+#  if !defined(CONFIG_SAMA5_OHCI) && !defined(CONFIG_SAMA5_EHCI)
+#    warning CONFIG_USBHOST is defined, but neither CONFIG_SAMA5_OHCI nor CONFIG_SAMA5_EHCI are defined
+#  endif
+#else
+#  undef CONFIG_SAMA5_OHCI
+#  undef CONFIG_SAMA5_EHCI
+#endif
+
+#if defined(CONFIG_SAMA5_OHCI) && defined(CONFIG_SAMA5_EHCI)
+#  warning Both CONFIG_SAMA5_OHCI and CONFIG_SAMA5_EHCI are defined
+#  undef CONFIG_SAMA5_EHCI
+#endif
+
 /* LEDs *****************************************************************************/
 /* There are two LEDs on the SAMA5D3 series-CM board that can be controlled
  * by software.  A  blue LED is controlled via PIO pins.  A red LED normally
@@ -322,6 +357,32 @@ bool sam_cardinserted(int slotno);
 bool sam_writeprotected(int slotno);
 #endif
 
+/************************************************************************************
+ * Name: sam_usbinitialize
+ *
+ * Description:
+ *   Called from sam_usbinitialize very early in inialization to setup USB-related
+ *   GPIO pins for the STM32F4Discovery board.
+ *
+ ************************************************************************************/
+
+#if defined(CONFIG_SAMA5_UHPHS) || defined(CONFIG_SAMA5_UDPHS)
+void weak_function sam_usbinitialize(void);
+#endif
+
+/****************************************************************************************************
+ * Name: stm32_usbhost_initialize
+ *
+ * Description:
+ *   Called at application startup time to initialize the USB host functionality. This function will
+ *   start a thread that will monitor for device connection/disconnection events.
+ *
+ ****************************************************************************************************/
+
+#if defined(CONFIG_SAMA5_OHCI) || defined(CONFIG_SAMA5_EHCI)
+int sam_usbhost_initialize(void);
+#endif
+
 /************************************************************************************
  * Name: up_ledinit
  ************************************************************************************/