675 lines
No EOL
21 KiB
C
Executable file
675 lines
No EOL
21 KiB
C
Executable file
/******************************************************************************
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*
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* (c) Copyright 2007-2013 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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*
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* @file xmbox.c
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*
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* Contains required functions for the XMbox driver.
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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 va First release
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* 1.00a ecm 06/01/07 Cleanup, new coding standard, check into XCS
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* 1.01a ecm 08/19/08 Fixed the receive routine, FSL leg, was using SendID
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* instead of the correct RecvID.
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* Fixed CRs 466320, 466322, 476535, 476242, 476243
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* new rev
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* 2.00a hm 04/09/09 Added support for mailbox v2.0, which has interrupts;
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* Fixed CR 502464, which removed extra
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* definitions that are not associated with
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* the interface.
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* Fixed the canonical definition so that each
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* interface is considered as a device instance.
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* 3.00a hbm 10/19/09 Migrated to HAL phase 1 to use xil_io.
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* Removed _m from the function names.
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* Renamed _mIsEmpty to _IsEmptyHw and _mIsFull
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* to _IsFullHw.
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* 3.02a bss 08/18/12 Added XMbox_GetStatus API for CR 676187
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*
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* </pre>
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*
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******************************************************************************/
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/***************************** Include Files *********************************/
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#include <string.h>
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#include "xmbox.h"
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#include "xil_assert.h"
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/************************** Constant Definitions *****************************/
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/**************************** Type Definitions *******************************/
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/***************** Macros (Inline Functions) Definitions *********************/
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/************************** Function Prototypes ******************************/
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/************************** Variable Definitions *****************************/
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/*****************************************************************************/
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/**
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*
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* Initializes a specific mailbox.
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*
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* @param InstancePtr is a pointer to the XMbox instance to be worked on.
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* @param CfgPtr is the device configuration structure containing
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* required HW build data.
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* @param EffectiveAddr is the Physical address of the hardware in a
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* Virtual Memory operating system environment. It is the Base
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* Address in a stand alone environment.
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*
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* @return
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* - XST_SUCCESS if initialization was successful
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*
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* @note None.
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*
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******************************************************************************/
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int XMbox_CfgInitialize(XMbox *InstancePtr, XMbox_Config *ConfigPtr,
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u32 EffectiveAddress)
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{
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Xil_AssertNonvoid(InstancePtr != NULL);
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Xil_AssertNonvoid(ConfigPtr != NULL);
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/*
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* Clear instance memory and make copy of configuration
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*/
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memset(InstancePtr, 0, sizeof(XMbox));
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memcpy(&InstancePtr->Config, ConfigPtr, sizeof(XMbox_Config));
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InstancePtr->Config.BaseAddress = EffectiveAddress;
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InstancePtr->IsReady = XIL_COMPONENT_IS_READY;
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return XST_SUCCESS;
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}
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/*****************************************************************************/
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/**
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*
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* Reads requested bytes from the mailbox referenced by InstancePtr,into the
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* buffer pointed to by the provided pointer. The number of bytes must be a
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* multiple of 4 (bytes). If not, the call will fail in an assert.
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*
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* This function is non blocking.
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*
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* @param InstancePtr is a pointer to the XMbox instance to be worked on.
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* @param BufferPtr is the buffer to read the mailbox contents into,
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* aligned to a word boundary.
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* @param RequestedBytes is the number of bytes of data requested.
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* @param BytesRecvdPtr is the memory that is updated with the number of
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* bytes of data actually read.
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*
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* @return
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* - XST_SUCCESS on success.
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* - XST_NO_DATA ifthere was no data in the mailbox.
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*
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* On success, the number of bytes read is returned through the pointer. The
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* call may return with fewer bytes placed in the buffer than requested (not
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* including zero). This is not necessarily an error condition and indicates
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* the amount of data that was currently available in the mailbox.
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*
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* @note None.
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*
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******************************************************************************/
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int XMbox_Read(XMbox *InstancePtr, u32 *BufferPtr, u32 RequestedBytes,
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u32 *BytesRecvdPtr)
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{
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u32 NumBytes;
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Xil_AssertNonvoid(InstancePtr != NULL);
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Xil_AssertNonvoid(!((u32) BufferPtr & 0x3));
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Xil_AssertNonvoid(RequestedBytes != 0);
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Xil_AssertNonvoid((RequestedBytes %4) == 0);
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Xil_AssertNonvoid(BytesRecvdPtr != NULL);
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NumBytes = 0;
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if (InstancePtr->Config.UseFSL == 0) {
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/* For memory mapped IO */
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if (XMbox_IsEmptyHw(InstancePtr->Config.BaseAddress))
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return XST_NO_DATA;
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/*
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* Read the Mailbox until empty or the length requested is
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* satisfied
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*/
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do {
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*BufferPtr++ =
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XMbox_ReadMBox(InstancePtr->Config.BaseAddress);
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NumBytes += 4;
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} while ((NumBytes != RequestedBytes) &&
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!(XMbox_IsEmptyHw(InstancePtr->Config.BaseAddress)));
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*BytesRecvdPtr = NumBytes;
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} else {
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/* FSL based Access */
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if (XMbox_FSLIsEmpty(InstancePtr->Config.RecvID))
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return XST_NO_DATA;
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/*
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* Read the Mailbox until empty or the length requested is
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* satisfied
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*/
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do {
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*BufferPtr++ =
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XMbox_FSLReadMBox(InstancePtr->Config.RecvID);
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NumBytes += 4;
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} while ((NumBytes != RequestedBytes) &&
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!(XMbox_FSLIsEmpty(InstancePtr->Config.RecvID)));
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*BytesRecvdPtr = NumBytes;
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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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*
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* Reads requested bytes from the mailbox referenced by InstancePtr,into the
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* buffer pointed to by the provided pointer. The number of bytes must be a
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* multiple of 4 (bytes). If not, the call will fail in an assert.
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*
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* @param InstancePtr is a pointer to the XMbox instance to be worked on.
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* @param BufferPtr is the buffer to read the mailbox contents into,
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* aligned to a word boundary.
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* @param RequestedBytes is the number of bytes of data requested.
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*
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* @return None.
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*
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* @note The call blocks until the number of bytes requested are
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* available.
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*
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******************************************************************************/
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void XMbox_ReadBlocking(XMbox *InstancePtr, u32 *BufferPtr,
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u32 RequestedBytes)
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{
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u32 NumBytes;
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Xil_AssertVoid(InstancePtr != NULL);
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Xil_AssertVoid(!((u32) BufferPtr & 0x3));
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Xil_AssertVoid(RequestedBytes != 0);
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Xil_AssertVoid((RequestedBytes % 4) == 0);
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NumBytes = 0;
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if (InstancePtr->Config.UseFSL == 0) {
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/* For memory mapped IO */
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/* Block while the mailbox FIFO has at-least some data */
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do {
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while(XMbox_IsEmptyHw(InstancePtr->Config.BaseAddress));
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/*
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* Read the Mailbox until empty or the length
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* requested is satisfied
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*/
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*BufferPtr++ =
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XMbox_ReadMBox(InstancePtr->Config.BaseAddress);
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NumBytes += 4;
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} while (NumBytes != RequestedBytes);
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} else {
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/* FSL based Access */
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/* Block while the mailbox FIFO has at-least some data */
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do {
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while (XMbox_FSLIsEmpty(InstancePtr->Config.RecvID));
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/*
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* Read the Mailbox until empty or the length requested
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* is satisfied
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*/
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*BufferPtr++ =
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XMbox_FSLReadMBox(InstancePtr->Config.RecvID);
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NumBytes += 4;
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} while (NumBytes != RequestedBytes);
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}
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}
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/*****************************************************************************/
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/**
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* Writes the requested bytes from the buffer pointed to by the provided
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* pointer into the mailbox referenced by InstancePtr.The number of bytes must
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* be a multiple of 4 (bytes). If not, the call will fail in an assert.
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*
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* This function is non blocking.
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*
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* @param InstancePtr is a pointer to the XMbox instance to be worked on.
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* @param BufferPtr is the source data buffer, aligned to a word
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* boundary.
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* @param RequestedBytes is the number of bytes requested to be written.
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* @param BytesRecvdPtr points to memory which is updated with the actual
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* number of bytes written, return value.
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* @return
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*
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* - XST_SUCCESS on success.
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* - XST_FIFO_NO_ROOM if the fifo was full.
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* On success, the number of bytes successfully written into the destination
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* mailbox is returned in the provided pointer. The call may return with
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* zero. This is not necessarily an error condition and indicates that the
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* mailbox is currently full.
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*
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* @note The provided buffer pointed to by BufferPtr must be aligned to a
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* word boundary.
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*
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******************************************************************************/
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int XMbox_Write(XMbox *InstancePtr, u32 *BufferPtr, u32 RequestedBytes,
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u32 *BytesSentPtr)
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{
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u32 NumBytes;
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Xil_AssertNonvoid(InstancePtr != NULL);
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Xil_AssertNonvoid(!((u32) BufferPtr & 0x3));
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Xil_AssertNonvoid(RequestedBytes != 0);
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Xil_AssertNonvoid((RequestedBytes %4) == 0);
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Xil_AssertNonvoid(BytesSentPtr != NULL);
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NumBytes = 0;
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if (InstancePtr->Config.UseFSL == 0) {
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/* For memory mapped IO */
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if (XMbox_IsFullHw(InstancePtr->Config.BaseAddress)) {
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return XST_FIFO_NO_ROOM;
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}
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/*
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* Write to the Mailbox until full or the length requested is
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* satisfied.
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*/
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do {
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XMbox_WriteMBox(InstancePtr->Config.BaseAddress,
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*BufferPtr++);
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NumBytes += 4;
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} while ((NumBytes != RequestedBytes) &&
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!(XMbox_IsFullHw(InstancePtr->Config.BaseAddress)));
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*BytesSentPtr = NumBytes;
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} else {
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/* FSL based Access */
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if (XMbox_FSLIsFull(InstancePtr->Config.SendID)) {
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return XST_FIFO_NO_ROOM;
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}
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/*
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* Write to the Mailbox until full or the length requested is
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* satisfied.
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*/
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do {
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XMbox_FSLWriteMBox(InstancePtr->Config.SendID,
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*BufferPtr++);
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NumBytes += 4;
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} while ((NumBytes != RequestedBytes) &&
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!(XMbox_FSLIsFull(InstancePtr->Config.SendID)));
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*BytesSentPtr = NumBytes;
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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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* Writes the requested bytes from the buffer pointed to by the provided
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* pointer into the mailbox referenced by InstancePtr. The number of bytes must
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* be a multiple of 4 (bytes). If not, the call will fail in an assert.
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*
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* @param InstancePtr is a pointer to the XMbox instance to be worked on.
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* @param BufferPtr is the source data buffer, aligned to a word boundary.
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* @param RequestedBytes is the number of bytes requested to be written.
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*
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* @return None.
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*
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* @note The call blocks until the number of bytes requested are written.
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* The provided buffer pointed to by BufferPtr must be aligned to a
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* word boundary.
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*
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******************************************************************************/
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void XMbox_WriteBlocking(XMbox *InstancePtr, u32 *BufferPtr, u32 RequestedBytes)
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{
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u32 NumBytes;
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Xil_AssertVoid(InstancePtr != NULL);
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Xil_AssertVoid(!((u32) BufferPtr & 0x3));
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Xil_AssertVoid(RequestedBytes != 0);
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Xil_AssertVoid((RequestedBytes %4) == 0);
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NumBytes = 0;
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if (InstancePtr->Config.UseFSL == 0) {
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/* For memory mapped IO */
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/* Block while the mailbox FIFO becomes free to transfer
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* at-least one word
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*/
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do {
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while (XMbox_IsFullHw(InstancePtr->Config.BaseAddress));
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XMbox_WriteMBox(InstancePtr->Config.BaseAddress,
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*BufferPtr++);
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NumBytes += 4;
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} while (NumBytes != RequestedBytes);
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} else {
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/* FSL based Access */
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/* Block while the mailbox FIFO becomes free to transfer
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* at-least one word
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*/
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do {
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while (XMbox_FSLIsFull(InstancePtr->Config.SendID));
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XMbox_FSLWriteMBox(InstancePtr->Config.SendID,
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*BufferPtr++);
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NumBytes += 4;
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} while (NumBytes != RequestedBytes);
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}
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}
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/*****************************************************************************/
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/**
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*
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* Checks to see if there is data available to be read.
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*
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* @param InstancePtr is a pointer to the XMbox instance to be worked on.
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*
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* @return
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* - FALSE if there is data to be read.
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* - TRUE is there no data to be read.
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*
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* @note None.
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*
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******************************************************************************/
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u32 XMbox_IsEmpty(XMbox *InstancePtr)
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{
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Xil_AssertNonvoid(InstancePtr != NULL);
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if (InstancePtr->Config.UseFSL == 0) {
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/* For memory mapped IO */
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return (XMbox_IsEmptyHw(InstancePtr->Config.BaseAddress));
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} else {
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/* FSL based Access */
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return (XMbox_FSLIsEmpty(InstancePtr->Config.RecvID));
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}
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}
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/*****************************************************************************/
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/**
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*
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* Checks to see if there is room in the write FIFO.
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*
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* @param InstancePtr is a pointer to the XMbox instance to be worked on.
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*
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* @return
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* - FALSE if there is room in write FIFO.
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* - TRUE if there is room in write FIFO.
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*
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* @note None.
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*
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******************************************************************************/
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u32 XMbox_IsFull(XMbox *InstancePtr)
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{
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Xil_AssertNonvoid(InstancePtr != NULL);
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if (InstancePtr->Config.UseFSL == 0) {
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/* For memory mapped IO */
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return (XMbox_IsFullHw(InstancePtr->Config.BaseAddress));
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} else {
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/* FSL based Access */
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return (XMbox_FSLIsFull(InstancePtr->Config.SendID));
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}
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}
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/*****************************************************************************/
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/**
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*
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* Resets the mailbox FIFOs by empting the READ FIFO and making sure the
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* Error Status is zero.
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*
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* @param InstancePtr is a pointer to the XMbox instance to be worked on.
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*
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* @return
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* - XST_SUCCESS on success.
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* - XST_FAILURE if there are any outstanding errors.
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*
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* @note Data from read FIFO is thrown away.
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*
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******************************************************************************/
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int XMbox_Flush(XMbox *InstancePtr)
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{
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Xil_AssertNonvoid(InstancePtr != NULL);
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if (InstancePtr->Config.UseFSL == 0) {
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/* For memory mapped IO */
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do {
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(void)XMbox_ReadMBox(InstancePtr->Config.BaseAddress);
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} while (!(XMbox_IsEmptyHw(InstancePtr->Config.BaseAddress)));
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} else {
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/* FSL based Access */
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do {
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(void) XMbox_FSLReadMBox(InstancePtr->Config.RecvID);
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} while (!(XMbox_FSLIsEmpty(InstancePtr->Config.RecvID)));
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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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* Sets the interrupt enable register for this mailbox. This function can only
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* be used for Non-FSL interface. If not, the function will fail in an assert.
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*
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* @param InstancePtr is a pointer to the instance to be worked on.
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* @param Mask is a logical OR of XMB_IX_* constants found in xmbox_hw.h.
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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 XMbox_SetInterruptEnable(XMbox *InstancePtr, u32 Mask)
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{
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Xil_AssertVoid(InstancePtr != NULL);
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Xil_AssertVoid(InstancePtr->Config.UseFSL == 0);
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if (InstancePtr->Config.UseFSL == 0)
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XMbox_WriteReg(InstancePtr->Config.BaseAddress,
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XMB_IE_REG_OFFSET,
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Mask);
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}
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/*****************************************************************************/
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/**
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* Retrieves the interrupt enable for the mailbox. AND the result of this
|
|
* function with XMB_IX_* to determine which interrupts of this mailbox
|
|
* are enabled. This function can only be used for Non-FSL interface. If not,
|
|
* the function will fail in an assert.
|
|
*
|
|
* @param InstancePtr is a pointer to the instance to be worked on.
|
|
*
|
|
* @return Mask of interrupt bits made up of XMB_IX_* constants found
|
|
* in xmbox_hw.h.
|
|
*
|
|
* @note None.
|
|
*
|
|
*
|
|
******************************************************************************/
|
|
u32 XMbox_GetInterruptEnable(XMbox *InstancePtr)
|
|
{
|
|
Xil_AssertNonvoid(InstancePtr != NULL);
|
|
Xil_AssertNonvoid(InstancePtr->Config.UseFSL == 0);
|
|
|
|
return XMbox_ReadReg(InstancePtr->Config.BaseAddress,
|
|
XMB_IE_REG_OFFSET);
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/**
|
|
* Retrieve the interrupt status for the mailbox. AND the results of this
|
|
* function with XMB_IX_* to determine which interrupts are currently pending
|
|
* to the processor. This function can only be used for Non-FSL interface.
|
|
* If not, the function will fail in an assert.
|
|
*
|
|
* @param InstancePtr is a pointer to the instance to be worked on.
|
|
*
|
|
* @return Mask of interrupt bits made up of XMB_IX_* constants found
|
|
* in xmbox_hw.h.
|
|
*
|
|
******************************************************************************/
|
|
u32 XMbox_GetInterruptStatus(XMbox *InstancePtr)
|
|
{
|
|
Xil_AssertNonvoid(InstancePtr != NULL);
|
|
Xil_AssertNonvoid(InstancePtr->Config.UseFSL == 0);
|
|
|
|
return XMbox_ReadReg(InstancePtr->Config.BaseAddress,
|
|
XMB_IS_REG_OFFSET);
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/**
|
|
* Clears pending interrupts with the provided mask. This function should be
|
|
* called after the software has serviced the interrupts that are pending.
|
|
* This function clears the corresponding bits of the Interrupt Status
|
|
* Register. This function can only be used for Non-FSL interface. If not, the
|
|
* function will fail in an assert.
|
|
*
|
|
* @param InstancePtr is a pointer to the instance to be worked on.
|
|
* @param Mask is a logical OR of XMB_IX_* constants found in
|
|
* xmbox_hw.h.
|
|
*
|
|
* @note None.
|
|
*
|
|
******************************************************************************/
|
|
void XMbox_ClearInterrupt(XMbox *InstancePtr, u32 Mask)
|
|
{
|
|
Xil_AssertVoid(InstancePtr != NULL);
|
|
Xil_AssertVoid(InstancePtr->Config.UseFSL == 0);
|
|
|
|
if (InstancePtr->Config.UseFSL == 0) {
|
|
XMbox_WriteReg(InstancePtr->Config.BaseAddress,
|
|
XMB_IS_REG_OFFSET,
|
|
Mask);
|
|
}
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/**
|
|
* Sets the Send Interrupt Threshold. This function can only be used for
|
|
* Non-FSL interface. If not, the function will fail in an assert.
|
|
*
|
|
* @param InstancePtr is a pointer to the instance to be worked on.
|
|
* @param Value is a value to set for the SIT. Only lower
|
|
* Log2(FIFO Depth) bits are used.
|
|
*
|
|
* @return None.
|
|
*
|
|
* @note None.
|
|
*
|
|
******************************************************************************/
|
|
void XMbox_SetSendThreshold(XMbox *InstancePtr, u32 Value)
|
|
{
|
|
Xil_AssertVoid(InstancePtr != NULL);
|
|
Xil_AssertVoid(InstancePtr->Config.UseFSL == 0);
|
|
|
|
if (InstancePtr->Config.UseFSL == 0) {
|
|
XMbox_WriteReg(InstancePtr->Config.BaseAddress,
|
|
XMB_SIT_REG_OFFSET,
|
|
Value);
|
|
}
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/**
|
|
* Set the Receive Interrupt Threshold. This function can only be used for
|
|
* Non-FSL interface. If not, the function will fail in an assert.
|
|
* @param InstancePtr is a pointer to the instance to be worked on.
|
|
* @param Value is a value to set for the RIT. Only lower
|
|
* Log2(FIFO Depth) bits are used.
|
|
*
|
|
* @return None.
|
|
*
|
|
* @note None.
|
|
*
|
|
******************************************************************************/
|
|
void XMbox_SetReceiveThreshold(XMbox *InstancePtr, u32 Value)
|
|
{
|
|
Xil_AssertVoid(InstancePtr != NULL);
|
|
Xil_AssertVoid(InstancePtr->Config.UseFSL == 0);
|
|
|
|
if (InstancePtr->Config.UseFSL == 0) {
|
|
XMbox_WriteReg(InstancePtr->Config.BaseAddress,
|
|
XMB_RIT_REG_OFFSET,
|
|
Value);
|
|
}
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/**
|
|
* Returns Status register contents. This function can only be used for
|
|
* Non-FSL interface. If not, the function will fail in an assert.
|
|
* @param InstancePtr is a pointer to the instance to be worked on.
|
|
*
|
|
* @return Value returns Status Register contents.
|
|
*
|
|
* @note None.
|
|
*
|
|
******************************************************************************/
|
|
u32 XMbox_GetStatus(XMbox *InstancePtr)
|
|
{
|
|
u32 Value;
|
|
Xil_AssertNonvoid(InstancePtr != NULL);
|
|
Xil_AssertNonvoid(InstancePtr->Config.UseFSL == 0);
|
|
|
|
|
|
Value = XMbox_ReadReg(InstancePtr->Config.BaseAddress,
|
|
XMB_STATUS_REG_OFFSET);
|
|
return Value;
|
|
|
|
} |