📄 mx2_ipl_read.c
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/*************************************************************************Title: Filename: $Header:$Hardware: MX21Summay:License: The contents of this file are subject to the Mozilla Public License Version 1.1 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.mozilla.org/MPL/Author: Company: Freescale Suzhou Design Center====================Change Log========================$Log:$********************************************************************************////@ingroup NAND_BOOTLOADER///@file mx2_ipl_read.c///@brief Read Data from NAND Flash////// @li Read Page From NAND Flash//////@remarks Because gcc will link all funtion to object file, you have /// to make sure ipl.bin below than 1.5K//////@author ///@bug///@version $Version$///@section history History/// 28-Apr-04 Copied from mx2_nand_read.c and removed some unused functions to reduce the size of ipl.bin/////<<<<<Include#ifdef _STANDALONE_#undef IO_ADDRESS#define IO_ADDRESS#define NFC_IO_ADDRESS#include "mx2.h"#else#include <linux/config.h>#include <linux/delay.h>#include <linux/errno.h>#include <linux/sched.h>#include <linux/types.h>#include <linux/mtd/mtd.h>#include <linux/mtd/nand.h>#include <linux/mtd/nand_ids.h>#include <linux/interrupt.h>#include <asm/io.h>#include <asm/arch/mx2.h>#endif #include "mx2_nand.h"//>>>>>Include//<<<<<< Private Structure//>>>>>> Private Structure//<<<<<< Global Variable//>>>>>> Global Variable//<<<<<Private Function Declearation//>>>>>Private Function Declearation//<<<<<Body///Call this function when operator MX2 NAND Controlervoid Preset(){ // _reg_NFC_CONFIGURATION=0x10; //unlocked first 2 page buffer //We don't use first 2 page buffer _reg_NFC_CONFIGURATION=0x0002; _reg_NFC_ULOCK_START_BLK=0; //_reg_NFC_ULOCK_END_BLK=NAND_FLASH_BLOCK_NUMBER; _reg_NFC_ULOCK_END_BLK=0xFFFF; _reg_NFC_NF_WR_PROT=0x0004; _reg_NFC_NF_CONFIG1=0x000A; _reg_NFC_RAM_BUF_ADDR=0x3; }///@brief Send Command to NAND Flash//////@param command NAND Flash Command///@return @li 0 Success/// @li others Failedu32 NAND_Command(IN u16 command){ _reg_NFC_NF_CONFIG2&=~NAND_FLASH_CONFIG2_INT; _reg_NFC_NAND_FLASH_CMD=command; _reg_NFC_NF_CONFIG2&=~NAND_FLASH_CONFIG2_FCMD; _reg_NFC_NF_CONFIG2|=NAND_FLASH_CONFIG2_FCMD; WAIT((!(_reg_NFC_NF_CONFIG2&NAND_FLASH_CONFIG2_INT)),100000); // while((!(_reg_NFC_NF_CONFIG2&NAND_FLASH_CONFIG2_INT))); if(!(_reg_NFC_NF_CONFIG2&NAND_FLASH_CONFIG2_INT)) return ERR_TIME_OUT; return 0;}///@brief Send Address to NAND Flash//////@param addr full address including col and page address and A8///@param cycle send addr need cycle number//////@return @li 0 Success/// @li others Failedu32 NAND_SendAddress(IN u32 addr,IN int cycle){ int i=0; for(i=0;i<cycle;i++) { // Send low half-word _reg_NFC_NF_CONFIG2&=~NAND_FLASH_CONFIG2_INT; if(cycle==4&&i>0) { _reg_NFC_NAND_FLASH_ADDR=(addr>>(i*8+1))&0xFFFF; }else _reg_NFC_NAND_FLASH_ADDR=addr>>i*8; _reg_NFC_NF_CONFIG2&=~NAND_FLASH_CONFIG2_FADD; _reg_NFC_NF_CONFIG2|=NAND_FLASH_CONFIG2_FADD; WAIT(!(_reg_NFC_NF_CONFIG2&NAND_FLASH_CONFIG2_INT),1000); if(!(_reg_NFC_NF_CONFIG2&NAND_FLASH_CONFIG2_INT)) return ERR_TIME_OUT; } return 0;}///@brief Read One Page Data to memory //////@param page Nand Flash Page Number///@param mainbuff main data buff, must large than 512B, /// If NULL,don't copy main data///@param parabuff OOB data buff, must large than 16B/// If NULL,don't copy this.//////@remarks All Address must be align 32bits//////@return @li 0 Success/// @li others Failedu32 NAND_Read_OnePage(IN int page,OUT char * mainbuff,OUT char * parabuff){ u32 * p1; u32 * p2; int i; Preset(); NAND_Command(NAND_CMD_READ0); NAND_SendAddress(page*NAND_FLASH_PAGE_MAIN_SIZE,4); _reg_NFC_NF_CONFIG2&=~NAND_FLASH_CONFIG2_INT; CONFIG2_SET_FDO_PAGE_OUT(); WAIT(!(_reg_NFC_NF_CONFIG2&NAND_FLASH_CONFIG2_INT),100000); if(!(_reg_NFC_NF_CONFIG2&NAND_FLASH_CONFIG2_INT)) return ERR_TIME_OUT; p1=(u32*)(mainbuff); p2=(u32*)( NFC_MAB3_BASE); if(p1!=0) { for(i=0;i<NAND_FLASH_PAGE_MAIN_SIZE/(sizeof(u32));i++) { *p1++=*p2++; } } /* p1=(u32*)parabuff; p2=(u32*)NFC_SAB3_BASE; if(p1!=0) { for(i=0;i<NAND_FLASH_PAGE_SPARE_SIZE/sizeof(u32);i++) *p1++=*p2++; } */ return 0; }//>>>>>Body⌨️ 快捷键说明
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