From 1c62f7ee2dcc11defc0f8862e9b833606676a04d Mon Sep 17 00:00:00 2001
From: Deval Shah <deval.maker@gmail.com>
Date: Fri, 22 Jul 2016 13:57:11 +0530
Subject: Added USB interrupt handler. And defined some macros regarding USB.

---
 c/src/lib/libbsp/arm/raspberrypi/include/irq.h         |  1 +
 c/src/lib/libbsp/arm/raspberrypi/include/raspberrypi.h |  9 +++++++++
 c/src/lib/libbsp/arm/raspberrypi/irq/irq.c             | 15 +++++++++++++++
 3 files changed, 25 insertions(+)

diff --git a/c/src/lib/libbsp/arm/raspberrypi/include/irq.h b/c/src/lib/libbsp/arm/raspberrypi/include/irq.h
index 8436c2dfc6..85225efc95 100644
--- a/c/src/lib/libbsp/arm/raspberrypi/include/irq.h
+++ b/c/src/lib/libbsp/arm/raspberrypi/include/irq.h
@@ -36,6 +36,7 @@
 #define BCM2835_INTC_TOTAL_IRQ       64 + 8
 
 
+#define BCM2835_IRQ_ID_USB           9
 #define BCM2835_IRQ_ID_AUX           29
 #define BCM2835_IRQ_ID_SPI_SLAVE     43
 #define BCM2835_IRQ_ID_PWA0          45
diff --git a/c/src/lib/libbsp/arm/raspberrypi/include/raspberrypi.h b/c/src/lib/libbsp/arm/raspberrypi/include/raspberrypi.h
index 60645b9baa..911b86be22 100644
--- a/c/src/lib/libbsp/arm/raspberrypi/include/raspberrypi.h
+++ b/c/src/lib/libbsp/arm/raspberrypi/include/raspberrypi.h
@@ -336,6 +336,15 @@
 
 /** @} */
 
+/**
+* @name USB Registers
+*
+* @{
+*/
+
+#define BCM2835_USB_BASE	(RPI_PERIPHERAL_BASE + 0x980000) /* DTC_OTG USB controller */
+
+/** @} */
 
 /** @} */
 
diff --git a/c/src/lib/libbsp/arm/raspberrypi/irq/irq.c b/c/src/lib/libbsp/arm/raspberrypi/irq/irq.c
index 7b3b2be3cb..f792c57ffc 100644
--- a/c/src/lib/libbsp/arm/raspberrypi/irq/irq.c
+++ b/c/src/lib/libbsp/arm/raspberrypi/irq/irq.c
@@ -91,6 +91,11 @@ void bsp_interrupt_dispatch(void)
   {
       vector = BCM2835_IRQ_ID_SPI;
   }
+  /* USB */
+  else if ( BCM2835_REG(BCM2835_IRQ_PENDING1) & BCM2835_BIT(9) )
+  {
+      vector = BCM2835_IRQ_ID_USB;
+  }
 
   if ( vector < 255 )
   {
@@ -144,6 +149,11 @@ rtems_status_code bsp_interrupt_vector_enable(rtems_vector_number vector)
   {
       BCM2835_REG(BCM2835_IRQ_ENABLE2) = BCM2835_BIT(22);
   }
+  /* USB */
+  else if ( vector == BCM2835_IRQ_ID_USB )
+  {
+      BCM2835_REG(BCM2835_IRQ_ENABLE1) = BCM2835_BIT(9);
+  }
   
   rtems_interrupt_enable(level);
 
@@ -194,6 +204,11 @@ rtems_status_code bsp_interrupt_vector_disable(rtems_vector_number vector)
   {
       BCM2835_REG(BCM2835_IRQ_DISABLE2) = BCM2835_BIT(22);
   }
+  /* USB */
+  else if ( vector == BCM2835_IRQ_ID_USB )
+  {
+      BCM2835_REG(BCM2835_IRQ_DISABLE1) = BCM2835_BIT(9);
+  }
 
   rtems_interrupt_enable(level);
 
-- 
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