297 lines
8.7 KiB
C
Executable file
297 lines
8.7 KiB
C
Executable file
/* $Id: xusb_phy_read_write.c,v 1.1.2.1 2011/08/23 11:35:44 vidhum Exp $ */
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/******************************************************************************
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*
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* (c) Copyright 2010 - 2013 Xilinx, Inc. All rights reserved.
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*
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* This file contains confidential and proprietary information of Xilinx, Inc.
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* and is protected under U.S. and international copyright and other
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* intellectual property laws.
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*
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* DISCLAIMER
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* This disclaimer is not a license and does not grant any rights to the
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* materials distributed herewith. Except as otherwise provided in a valid
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* license issued to you by Xilinx, and to the maximum extent permitted by
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* applicable law: (1) THESE MATERIALS ARE MADE AVAILABLE "AS IS" AND WITH ALL
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* FAULTS, AND XILINX HEREBY DISCLAIMS ALL WARRANTIES AND CONDITIONS, EXPRESS,
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* IMPLIED, OR STATUTORY, INCLUDING BUT NOT LIMITED TO WARRANTIES OF
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* MERCHANTABILITY, NON-INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE;
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* and (2) Xilinx shall not be liable (whether in contract or tort, including
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* negligence, or under any other theory of liability) for any loss or damage
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* of any kind or nature related to, arising under or in connection with these
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* materials, including for any direct, or any indirect, special, incidental,
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* or consequential loss or damage (including loss of data, profits, goodwill,
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* or any type of loss or damage suffered as a result of any action brought by
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* a third party) even if such damage or loss was reasonably foreseeable or
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* Xilinx had been advised of the possibility of the same.
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*
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* CRITICAL APPLICATIONS
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* Xilinx products are not designed or intended to be fail-safe, or for use in
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* any application requiring fail-safe performance, such as life-support or
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* safety devices or systems, Class III medical devices, nuclear facilities,
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* applications related to the deployment of airbags, or any other applications
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* that could lead to death, personal injury, or severe property or
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* environmental damage (individually and collectively, "Critical
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* Applications"). Customer assumes the sole risk and liability of any use of
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* Xilinx products in Critical Applications, subject only to applicable laws
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* and regulations governing limitations on product liability.
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*
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* THIS COPYRIGHT NOTICE AND DISCLAIMER MUST BE RETAINED AS PART OF THIS FILE
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* AT ALL TIMES.
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*
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******************************************************************************/
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/*****************************************************************************/
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/**
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* @file xusb_phy_read_write.c
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*
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* This file contains PHY register access related example.
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*
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* @note This example only shows reading and writing to the ULPI PHY
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* SCRATCH register.The user can access any other register as per
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* their requirement.
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*
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* <pre>
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* MODIFICATION HISTORY:
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*
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* Ver Who Date Changes
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* ----- ---- -----------------------------------------------------------------
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* 1.00a hvm 12/3/10 First release
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*
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* </pre>
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*****************************************************************************/
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/***************************** Include Files *********************************/
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#include "xusb.h"
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#include "xintc.h"
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#include "stdio.h"
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#include "xenv_standalone.h"
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#include "xil_exception.h"
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#include "xil_cache.h"
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/************************** Constant Definitions *****************************/
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#define USB_DEVICE_ID XPAR_USB_0_DEVICE_ID
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#define INTC_DEVICE_ID XPAR_INTC_0_DEVICE_ID
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#define USB_INTR XPAR_INTC_0_USB_0_VEC_ID
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#define ULPI_SCRATCH_REGISTER 0x16
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#define WRITE_REG_DATA 0xAA
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/************************** Variable Definitions *****************************/
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XUsb UsbInstance; /* The instance of the USB device */
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XUsb_Config *UsbConfigPtr; /* Instance of the USB config structure */
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XIntc InterruptController; /* Instance of the Interrupt Controller */
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volatile u8 PhyAccessDone = 0;
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void UsbIfPhyIntrHandler(void *CallBackRef, u32 IntrStatus);
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static int SetupInterruptSystem(XUsb * InstancePtr);
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/*****************************************************************************/
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/**
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* This main function starts the USB application.
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*
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*
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* @param None.
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*
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* @return
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* - XST_SUCCESS if successful.
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* - XST_FAILURE if test fails.
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* @note None.
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*
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*****************************************************************************/
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int main()
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{
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int Status;
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u32 ReadRegData = 0;
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/*
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* Initialize the USB driver.
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*/
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UsbConfigPtr = XUsb_LookupConfig(USB_DEVICE_ID);
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if (NULL == UsbConfigPtr) {
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return XST_FAILURE;
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}
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#ifdef __PPC__
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Xil_ICacheEnableRegion (0x80000001);
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Xil_DCacheEnableRegion (0x80000001);
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#endif
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#ifdef __MICROBLAZE__
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Xil_ICacheInvalidate();
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Xil_ICacheEnable();
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Xil_DCacheInvalidate();
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Xil_DCacheEnable();
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#endif
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/*
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* We are passing the physical base address as the third argument
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* because the physical and virtual base address are the same in our
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* example. For systems that support virtual memory, the third
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* argument needs to be the virtual base address.
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*/
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Status = XUsb_CfgInitialize(&UsbInstance,
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UsbConfigPtr, UsbConfigPtr->BaseAddress);
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if (XST_SUCCESS != Status) {
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return XST_FAILURE;
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}
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XUsb_UlpiIntrSetHandler (&UsbInstance, (void *) UsbIfPhyIntrHandler,
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&UsbInstance);
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/*
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* Setup the interrupt system.
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*/
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Status = SetupInterruptSystem(&UsbInstance);
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if (Status != XST_SUCCESS) {
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return XST_FAILURE;
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}
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/*
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* Enable the interrupts.
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*/
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XUsb_IntrEnable(&UsbInstance, XUSB_STATUS_GLOBAL_INTR_MASK |
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XUSB_STATUS_PHY_ACCESS_MASK);
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XUsb_Start(&UsbInstance);
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/*
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* Initiate a ULPI register write transaction.
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*/
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XUsb_UlpiPhyWriteRegister(&UsbInstance, ULPI_SCRATCH_REGISTER,
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WRITE_REG_DATA);
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/* Wait until the write transaction is done */
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while (!PhyAccessDone);
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/*
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* Read the PHY read register. We do not wait for transaction
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* complete interrupt in this case. The API internally polls for the
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* completion and then returns the register value read.
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*/
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ReadRegData = XUsb_UlpiPhyReadRegister(&UsbInstance,
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ULPI_SCRATCH_REGISTER);
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/* Compare the Written data and read data*/
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if (ReadRegData != WRITE_REG_DATA) {
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return XST_FAILURE;
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}
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return XST_SUCCESS;
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}
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/*****************************************************************************/
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/**
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* This function is the ULPI PHY interrupt handler
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*
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*
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* @param CallBackRef is the callback reference passed from the interrupt
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* handler, which in our case is a pointer to the driver instance.
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* @param IntrStatus is a bit mask indicating pending interrupts.
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*
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* @return None.
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*
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* @note None.
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*
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******************************************************************************/
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void UsbIfPhyIntrHandler(void *CallBackRef, u32 IntrStatus)
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{
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XUsb *InstancePtr;
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InstancePtr = (XUsb *) CallBackRef;
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if (IntrStatus & XUSB_STATUS_PHY_ACCESS_MASK) {
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PhyAccessDone = 1;
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}
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}
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/******************************************************************************/
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/**
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*
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* This function sets up the interrupt system such that interrupts can occur
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* for the USB. This function is application specific since the actual
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* system may or may not have an interrupt controller. The USB could be
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* directly connected to a processor without an interrupt controller. The
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* user should modify this function to fit the application.
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*
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* @param InstancePtr contains a pointer to the instance of the USB
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* component, which is going to be connected to the interrupt
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* controller.
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*
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* @return
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* - XST_SUCCESS if successful.
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* - XST_FAILURE. if it fails.
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*
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* @note None
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*
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*******************************************************************************/
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static int SetupInterruptSystem(XUsb * InstancePtr)
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{
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int Status;
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/*
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* Initialize the interrupt controller driver.
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*/
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Status = XIntc_Initialize(&InterruptController, INTC_DEVICE_ID);
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if (Status != XST_SUCCESS) {
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return XST_FAILURE;
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}
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/*
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* Connect a device driver handler that will be called when an interrupt
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* for the USB device occurs.
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*/
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Status = XIntc_Connect(&InterruptController, USB_INTR,
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(XInterruptHandler) XUsb_IntrHandler,
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(void *) InstancePtr);
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if (Status != XST_SUCCESS) {
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return XST_FAILURE;
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}
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/*
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* Start the interrupt controller such that interrupts are enabled for
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* all devices that cause interrupts, specific real mode so that
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* the USB can cause interrupts through the interrupt controller.
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*/
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Status = XIntc_Start(&InterruptController, XIN_REAL_MODE);
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if (Status != XST_SUCCESS) {
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return XST_FAILURE;
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}
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/*
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* Enable the interrupt for the USB.
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*/
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XIntc_Enable(&InterruptController, USB_INTR);
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/*
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* Initialize the exception table
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*/
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Xil_ExceptionInit();
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/*
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* Register the interrupt controller handler with the exception table
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*/
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Xil_ExceptionRegisterHandler(XIL_EXCEPTION_ID_INT,
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(Xil_ExceptionHandler)XIntc_InterruptHandler,
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&InterruptController);
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/*
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* Enable non-critical exceptions
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*/
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Xil_ExceptionEnable();
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return XST_SUCCESS;
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}
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