Move all SAMA5 EHCI interrupt handling to the worker thread

arch/arm/src/sama5/Kconfig

@@ -386,14 +386,14 @@ config SAMA5_EHCI_NQHS
 	default 4
 	---help---
 		Configurable number of Queue Head (QH) structures.  The default is
-		one per Root hub port plus one for EP0.
+		one per Root hub port plus one for EP0 (4).
 
 config SAMA5_EHCI_NQTDS
 	int "Number of Queue Element Transfer Descriptor (qTDs)"
-	default 4
+	default 6
 	---help---
 		Configurable number of Queue Element Transfer Descriptor (qTDs).
-		The default is one per root hub plus three from EP0.
+		The default is one per root hub plus three from EP0 (6).
 
 config SAMA5_EHCI_BUFSIZE
 	int "Size of one request/descriptor buffer"

configs/sama5d3x-ek/README.txt

@@ -1166,7 +1166,7 @@ Configurations
           volume when it is removed.  But those callbacks are not used in
           this configuration.
 
-    10) Support the USB full-speed OHCI host driver can be enabled by change
+    10) Support the USB full-speed OHCI host driver can be enabled by changing
         the NuttX configuration file as follows:
 
         System Type -> ATSAMA5 Peripheral Support
@@ -1193,6 +1193,28 @@ Configurations
        multiple of the 48MHz needed for OHCI.  The delay loop calibration
        values that are used will be off slightly because of this.
 
+    10) Support the USB high-speed EHCI host driver can be enabled by changing
+        the NuttX configuration file as follows:
+
+        System Type -> ATSAMA5 Peripheral Support
+          CONFIG_SAMA5_UHPHS=y                 : USB Host High Speed
+
+        System Type -> USB High Speed Host driver options
+          CONFIG_SAMA5_EHCI=y                  : High-speed EHCI support
+                                               : Defaults for values probably OK
+        Device Drivers
+          CONFIG_USBHOST=y                     : Enable USB host support
+
+        Device Drivers -> USB Host Driver Support
+          CONFIG_USBHOST_ISOC_DISABLE=y        : Isochronous endpoints not used
+          CONFIG_USBHOST_MSC=y                 : Enable the mass storage class driver
+
+        Library Routines
+          CONFIG_SCHED_WORKQUEUE               : Worker thread support is required
+
+       Application Configuration -> NSH Library
+         CONFIG_NSH_ARCHINIT=y                 : NSH board-initialization
+
     STATUS:
       2013-7-19:  This configuration (as do the others) run at 396MHz.
         The SAMA5D3 can run at 536MHz.  I still need to figure out the
@@ -1255,6 +1277,10 @@ Configurations
         d) OHCI will support 3 downstream points, but I currently have only
            one enabled.
 
+      2013-8-20:  Added description to add EHCI to the configuration.  At
+        present, however, EHCI is still a work in progress and not ready for
+        prime time.
+
   ostest:
     This configuration directory, performs a simple OS test using
     examples/ostest.

include/nuttx/usb/ehci.h

@@ -282,11 +282,11 @@
 
 #define EHCI_INT_USBINT                (1 << 0)   /* Bit 0:  USB Interrupt */
 #define EHCI_INT_USBERRINT             (1 << 1)   /* Bit 1:  USB Error Interrupt */
-#define EHCI_INT_PCHG                  (1 << 2)   /* Bit 2:  Port Change Detect */
+#define EHCI_INT_PORTSC                (1 << 2)   /* Bit 2:  Port Change Detect */
 #define EHCI_INT_FLROLL                (1 << 3)   /* Bit 3:  Frame List Rollover */
 #define EHCI_INT_SYSERROR              (1 << 4)   /* Bit 4:  Host System Error */
 #define EHCI_INT_AAINT                 (1 << 5)   /* Bit 5:  Interrupt on Async Advance */
-
+#define ECHI_INT_ALLINTS               (0x3f)     /* Bits 0-5:  All interrupts */
                                                   /* Bits 6-11: Reserved */
 #define EHCI_USBSTS_HALTED             (1 << 12)  /* Bit 12: HC Halted */
 #define EHCI_USBSTS_RECLAM             (1 << 13)  /* Bit 13: Reclamation */
@@ -352,6 +352,9 @@
 #define EHCI_PORTSC_WKOCE              (1 << 22)  /* Bit 22: Wake on Over-current Enable */
                                                   /* Bits 23-31: Reserved */
 
+#define EHCI_PORTSC_ALLINTS            (EHCI_PORTSC_CSC | EHCI_PORTSC_PEC | \
+                                        EHCI_PORTSC_OCC | EHCI_PORTSC_RESUME)
+
 /* Data Structures **************************************************************************/
 /* Paragraph 3 */