8fc5ca745a
This patch has changes in driver code to fix MISRA C voilations. Signed-off-by: Shakti Bhatnagar <shaktib@xilinx.com>
114 lines
3.8 KiB
C
114 lines
3.8 KiB
C
/******************************************************************************
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*
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* Copyright (C) 2015 Xilinx, Inc. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* Use of the Software is limited solely to applications:
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* (a) running on a Xilinx device, or
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* (b) that interact with a Xilinx device through a bus or interconnect.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* XILINX CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
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* OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* Except as contained in this notice, the name of the Xilinx shall not be used
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* in advertising or otherwise to promote the sale, use or other dealings in
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* this Software without prior written authorization from Xilinx.
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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 xnandpsu_onfi.c
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*
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* This file contains the implementation of ONFI specific functions.
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*
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* @note None
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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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* 1.0 nm 05/06/2014 First release
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* </pre>
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*
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******************************************************************************/
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/***************************** Include Files *********************************/
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#include "xnandpsu_onfi.h"
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#include "xnandpsu.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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/*****************************************************************************/
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/**
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*
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* This function calculates ONFI paramater page CRC.
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*
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* @param Parambuf is a pointer to the ONFI paramater page buffer.
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* @param StartOff is the starting offset in buffer to calculate CRC.
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* @param Length is the number of bytes for which CRC is calculated.
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*
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* @return
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* CRC value.
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* @note
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* None.
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*
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******************************************************************************/
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u32 XNandPsu_OnfiParamPageCrc(u8 *ParamBuf, u32 StartOff, u32 Length)
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{
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const u32 CrcInit = 0x4F4EU;
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const u32 Order = 16U;
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const u32 Polynom = 0x8005U;
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u32 i, j, c, Bit;
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u32 Crc = CrcInit;
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u32 DataIn;
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u32 DataByteCount = 0U;
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u32 CrcMask, CrcHighBit;
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CrcMask = ((u32)(((u32)1 << (Order - (u32)1)) -(u32)1) << (u32)1) | (u32)1;
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CrcHighBit = (u32)((u32)1 << (Order - (u32)1));
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/*
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* CRC covers the data bytes between byte 0 and byte 253
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* (ONFI 1.0, section 5.4.1.36)
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*/
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for(i = StartOff; i < Length; i++) {
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DataIn = *(ParamBuf + i);
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c = (u32)DataIn;
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DataByteCount++;
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j = 0x80U;
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while(j != 0U) {
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Bit = Crc & CrcHighBit;
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Crc <<= 1U;
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if ((c & j) != 0U) {
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Bit ^= CrcHighBit;
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}
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if (Bit != 0U) {
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Crc ^= Polynom;
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}
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j >>= 1U;
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}
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Crc &= CrcMask;
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}
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return Crc;
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}
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