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NX_flash.c
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/*********************************************************************************
*Flash (Data Record Management) driver *
*Version: 1.0.0 *
*2007/07/16 writed by Bulla Liu
*(C) Copyright 2007-2009, Emeson NetworkPower China Inc.
*
*
*********************************************************************************/
#include <linux/config.h>
#include <linux/version.h>
#include <linux/types.h>
#include <linux/sched.h>
#include <linux/timer.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/fs.h>
#include <linux/mm.h>
#include <linux/delay.h>
#include <linux/time.h>
#include <asm/param.h>
//#include <linux/malloc.h>
#include <asm/uaccess.h>
#include <linux/errno.h>
#include <linux/vmalloc.h>
#include <linux/signal.h>
#include <asm/bitops.h>
#include <linux/ctype.h>
//#include <asm/irq.h>
#include <asm/ptrace.h>
#include <linux/fs.h>
#include <linux/wrapper.h>
#include <linux/wait.h>
#include <linux/interrupt.h>
#include <asm/io.h>
#include <linux/ioport.h>
#include <linux/spinlock.h>
#ifdef MODULE
#include <linux/module.h>
#else
#define MOD_INC_USE_COUNT
#define MOD_DEC_USE_COUNT
#endif
#include "NX_flash.h"
#include "NX_record.h"
/*==================================================*/
/*=========以下为驱动设备通用定义部分===============*/
/*==================================================*/
#define DEVICE_NAME "dataflash"
#define DEVICE_MAJOR 166 /* Reserverd for "data flash" */
//#define DEBUG 1 /*调试模式，可以打印一些调试信息*/
/* Function Prototypes */
static int dataflash_device_init (void) __init;
static int dataflash_device_release(struct inode *, struct file *);
static int dataflash_device_open(struct inode *, struct file *);
static ssize_t dataflash_device_read(struct file *,char *,size_t,loff_t *);
static ssize_t dataflash_device_write(struct file *file,char *buf,size_t count,loff_t *ppos);
static int dataflash_device_ioctl(struct inode *inode, struct file *filp,unsigned int cmd, unsigned long arg);
static int Device_Open=0;
static struct file_operations Fops_dataflash =
{
owner: THIS_MODULE,
open: dataflash_device_open,
release: dataflash_device_release,
read: dataflash_device_read,
write: dataflash_device_write,
ioctl: dataflash_device_ioctl,
};
/*==================================================*/
/*=========以下为驱动设备专用定义部分==============*/
/*==================================================*/
static char * dataflash_device_driver_ver="Emerson NX data flash driver version: 1.00\n";
//Flash物料操作的地址指针
static volatile unsigned short * data_flash_base = NULL;
//Flash的基本数据信息
static CFIDENT CFIident;
static CFIFRI CFIpri;
static CFISYS CFIsys;
//Flash的操作状态：Unknown, Reading, Programming, Block erasing, Chip erasing.
static volatile unsigned char ucFlashStatus = 0;
//Flash的擦除的计数器
static volatile unsigned int uiErase200msCnt = 0;
//当前正在擦除的Block编号
static volatile unsigned char ucBlockInErasing = 0xFF;
//Flash中哪个扇区在充当基本扇区.
static volatile unsigned int uiBasicBlock;
//Flash中每个扇区的在整个Flash空间的偏移地址,偏移相对于短整型数据类型. 且第一个Boot扇区定义为第一个扇区号。
static volatile unsigned int uiBlockOffsetAddr[200];
//Flash中每个扇区的在大小,单位为短整型数据类型.
static volatile unsigned int BlockSizeList[200];
//擦除计数器, 当Flash处于读取状态, 会定期搜索Dirty扇区进行擦除.
static struct timer_list erase_timer;
static void erase_state_poll(unsigned long period);
//读取Flash芯片的CFI接口数据
static void ReadCFI(void);
//Flash芯片的底层操作函数
static void EraseSuspend();
static void EraseResume();
static inline unsigned short ReadWord(unsigned int addr);
static void BlockErase(unsigned short No);
static void ChipErase(void);
static void RecordDataBlockErase(unsigned short uBlockSeclect);
static void Send_CMD(unsigned char cmd);
static unsigned char WriteWord(unsigned int addr, unsigned short data);
//Flash芯片的基本信息数据结构变量
static BASIC_FLASH_INFO_T tBasicFlashInfo;
//Flash芯片中记录的通用数据结构变量
static FLASH_RECORD_T tFlashRecordW;
//Flash芯片记录管理数据结构变量
static RECORD_MANAGE_T tRecordManageParameterp[INV_FAULT_RECORD+1];
//向Flash中写入一条指定的记录数据
static unsigned char ucWriteOneRecord(FLASH_RECORD_T *pFlashRecord);
//从Flash中读出一条指定的记录数据
static unsigned char ucReadOneRecord(FLASH_RECORD_T *pFlashRecord);
//刷新Flash的基本信息, 如果没有建立基本信息记录,就重新建立
static unsigned char ucUpdateFlashBasicInformation(void);
//根据Flash中各个记录的现状, 刷新Flash操作的数据结构
static unsigned char ucInitialRecordManagement(void);
//从Flash中读取一条记录指定编号的记录数据
static unsigned char ucReadOneRecordFromFlash(FLASH_RECORD_T *pFlashRecord);
//向Flash中写入一条新记录数据
static unsigned char ucWriteOneNewRecordToFlash(FLASH_RECORD_T * pRecord);
static FLASH_RECORD_T tFlashRecordR;
static FLASH_RECORD_T tRecordForTest;
static void vWriteAEventRecordForTest();
static void vReadAEventRecordForTest();
//static unsigned char ucReadOneFaultRecordFromFlash(FLASH_RECORD_T *pFlashRecord);
//static unsigned char ucWriteOneFaultRecordToFlash(FLASH_RECORD_T * pRecord);
static void vWriteAFaultRecordForTest();
static void vReadAFaultRecordForTest();
static void vPrintAllValidDataOnOneBlock(unsigned char ucBlock);
static void vPrintAllValidRecordOnOneBlock(unsigned char ucBlock);
static void vWriteABlockRecordForTest(unsigned char ucRecordType);
static void vReadABlockRecordForTest(unsigned char ucRecordType);
int Debug = 1;
MODULE_PARM(Debug,"i");
/* Initialize the driver - Register the character device */
static int __init dataflash_device_init (void)
{
int ret;
int i;
int x,y;
struct timeval tv1,tv2;
unsigned long tCurrentTime;
unsigned long flags;
/* Register the character device */
if ((ret = register_chrdev(DEVICE_MAJOR, DEVICE_NAME, &Fops_dataflash)) < 0)
{
printk ("dataflash Device failed with %d\n", ret);
return (ret);
}
PRINT_TRACE(Debug)("%s the major is %d.\n",dataflash_device_driver_ver,DEVICE_MAJOR);
data_flash_base = (volatile unsigned short *)ioremap(DATA_FLASH_BASE,0x800000);
ReadCFI();
Send_CMD(CMD_RESET_DATA);
//ChipErase();
ret = ucUpdateFlashBasicInformation();
ret = ucInitialRecordManagement();
//for test
printk ("--flash:record block1= %d,block2=%d---\n", tRecordManageParameterp[EVENT_RECORD].tUsedBlocks[0].ucBlockNum,
tRecordManageParameterp[EVENT_RECORD].tUsedBlocks[1].ucBlockNum);
del_timer_sync(&erase_timer);
init_timer(&erase_timer);
erase_timer.function = erase_state_poll;
erase_timer.data = ERASE_CHECK_PERIOD; /*check state per 100ms*/
erase_timer.expires = jiffies + erase_timer.data;
add_timer(&erase_timer);
return (0);
}
static int dataflash_device_open (struct inode *inode, struct file *file)
{
int num = MAJOR(inode->i_rdev);
int type = MINOR(inode->i_rdev);
printk ("flash device_open(%p,%p)\n", inode, file);
printk("dataflash device major is %d\n",num);
printk("dataflash device minor is %d\n",type);
if (Device_Open>0)
{
printk("dataflash Device is busy!\n");
return -EBUSY;
}
MOD_INC_USE_COUNT;
Device_Open++;
return 0;
}
static int dataflash_device_release (struct inode *inode, struct file *file)
{
printk ("flash device_release(%p,%p)\n", inode, file);
MOD_DEC_USE_COUNT;
Device_Open--;
return 0;
}
static ssize_t dataflash_device_read (struct file *file,char *buf, size_t count, loff_t *ppos)
{
int rc=0;
unsigned char i;
if (count!=sizeof(FLASH_RECORD_T))
{
printk("dataflash Read Frame size is error!\n");
return ERROR_READ_SYSCALL_COUNT;
}
rc = verify_area(VERIFY_WRITE,buf,count);
if (rc == -EFAULT)
{
printk("dataflash driver read syscall verify area fail\n");
return ERROR_READ_SYSCALL_VERIRY;
}
copy_from_user((char *)(&tFlashRecordR), buf, count);
PRINT_TRACE(Debug)("dataflash read syscall entry ---- %d\n", tFlashRecordR.usID);
//开始读取Flash中的记录
rc = ucReadOneRecord(&tFlashRecordR);
if (rc == 0x00)
{
copy_to_user((char *)buf,(char *)(&tFlashRecordR),count);
}
return rc;
}
static ssize_t dataflash_device_write(struct file *file,char *buf,size_t count,loff_t *ppos)
{
int rc=0;
unsigned char ret, i;
if (count!=sizeof(FLASH_RECORD_T))
{
printk("dataflash Write Frame size is error!\n");
return (ERROR_WRITE_SYSCALL_COUNT);
}
rc = verify_area(VERIFY_WRITE,buf,count);
if (rc == -EFAULT)
{
printk("dataflash Write read syscall verify area fail\n");
return ERROR_WRITE_SYSCALL_VERIRY;
}
copy_from_user((char *)(&tFlashRecordW), buf, count);
ret = ucWriteOneRecord(&tFlashRecordW);
return(ret);
}
static int dataflash_device_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
int rc = 0;
/*控制命令必须是已定义的*/
if ((cmd != CMD_SECTOR_ERASE_UNLOCK_DATA) && (cmd != CMD_CHIP_ERASE_UNLOCK_DATA)
&& (cmd != CMD_GET_FLASH_OPRATION_STATE) && (cmd != CMD_EVENT_RECORD_ERASE))
{
printk("dataflash_device_ioctl() Error: no recognized cmd value!\n");
rc = -EINVAL;
return(ERROR_IOCTL_SYSCALL_CMD);
}
/*控制命令的参数也必须是已经定义过的*/
if (cmd == CMD_SECTOR_ERASE_UNLOCK_DATA)
{
if ((arg > tBasicFlashInfo.usTotalBlocks)||(arg == tBasicFlashInfo.usTotalBlocks))
{
printk("dataflash_device_ioctl() Error: no recognized arg value! --- %d\n",arg);
rc = -EINVAL;
return(ERROR_IOCTL_SYSCALL_ARG);
}
}
//FLASH state
if (cmd == CMD_GET_FLASH_OPRATION_STATE)
{
return ucFlashStatus;
}
if (ucFlashStatus != READING)
{
printk("dataflash_device_ioctl() Error: The chip is not in Reading state -- %d\n", ucFlashStatus);
rc = -EINVAL;
return(ERROR_IOCTL_SYSCALL_BUSY);
}
//块擦除
if (cmd == CMD_SECTOR_ERASE_UNLOCK_DATA)
{
BlockErase(arg);
}
//片擦除
if (cmd == CMD_CHIP_ERASE_UNLOCK_DATA)
{
ChipErase();
}
//erase event record
if (cmd == CMD_EVENT_RECORD_ERASE)
{
RecordDataBlockErase(arg);
}
return (rc);
}
/*
* Cleanup - unregister the driver
*/
static void __exit uninst_dataflash_device(void)
{
int minor, ret;
del_timer_sync(&erase_timer);
/* Unregister the device */
ret = unregister_chrdev (DEVICE_MAJOR, DEVICE_NAME);
iounmap((unsigned char *)data_flash_base);
/* If there's an error, report it */
if (ret < 0)
{
printk ("unregister_chrdev: error %d\n", ret);
return;
}
PRINT_TRACE(Debug)("dataflash driver succesfully uninstalled\n");
}
/****************************************************/
/*---对 Flash 器件的底层操作函数集------*/
/****************************************************/
static unsigned int uiPower(unsigned char base, unsigned short factor)
{
unsigned short i;
unsigned int result;
result = 1;
for (i=0; i<factor; i++)
{
result = result * base;
}
return(result);
}
/****************************************************/
/*函数名称:erase_state_poll */
/*函数功能:Erase process counter */
/*输入参数: */
/* period: */
/*输出参数: N/A */
/*修改记录: */
/****************************************************/
static int testvar = 0;
static void erase_state_poll(unsigned long period)
{
unsigned char i,j;
unsigned short status1, status2, ret;
unsigned char ucSize;
unsigned int uiStartAddressOfFlag;
ucBlockInErasing = 0xFF;
if ((ucFlashStatus == BLOCKERASING) || (ucFlashStatus == CHIPERASING))
{
status1 = * data_flash_base; /*读取一次状态寄存器*/
status2 = * data_flash_base; /*读取一次状态寄存器*/
if ((status1 & 0x40) == (status2 & 0x40))
{
//正常结束
ucFlashStatus = READING; //Register a reading status
uiErase200msCnt = 0;
PRINT_TRACE(Debug)("Erase is finished\n");
//清除擦除标志
for (i=0; i<INV_FAULT_RECORD; i++)
{
if (tRecordManageParameterp[i+1].tUsedBlocks[0].ucBlockStatus == BLOCK_ERASING)
{
tRecordManageParameterp[i+1].tUsedBlocks[0].ucBlockStatus = BLOCK_NO_DATA;
break;
}
else if (tRecordManageParameterp[i+1].tUsedBlocks[1].ucBlockStatus == BLOCK_ERASING)
{
tRecordManageParameterp[i+1].tUsedBlocks[1].ucBlockStatus = BLOCK_NO_DATA;
break;
}
}
}
else if ((status1 & 0x0020) == 0x0020)
{
/*异常结束*/
ucFlashStatus = READING; /*Register a reading status*/
uiErase200msCnt = 0; /*stop a 100ms counter*/
/*强制恢复到读状态*/
*(data_flash_base+0x55)=0xF0;
//清除擦除标志
for (i=0; i<INV_FAULT_RECORD; i++)
{
if (tRecordManageParameterp[i+1].tUsedBlocks[0].ucBlockStatus == BLOCK_ERASING)
{
tRecordManageParameterp[i+1].tUsedBlocks[0].ucBlockStatus = BLOCK_NO_DATA;
break;
}
else if (tRecordManageParameterp[i+1].tUsedBlocks[1].ucBlockStatus == BLOCK_ERASING)
{
tRecordManageParameterp[i+1].tUsedBlocks[1].ucBlockStatus = BLOCK_NO_DATA;
break;
}
}
}
else
{
uiErase200msCnt ++;
if (ucFlashStatus == CHIPERASING)
{
PRINT_TRACE(Debug)("In progress of Chip erasing ---%d\n", uiErase200msCnt);
}
}
}
else if (ucFlashStatus == READING) //Flash 处于读状态时，主动找Dirty状态扇区来擦写
{
//新方法：查找一个Dirty扇区进行擦除
for (i=0; i<INV_FAULT_RECORD; i++)
{
if (tRecordManageParameterp[i+1].tUsedBlocks[0].ucBlockStatus == BLOCK_IS_DIRTY)
{
ucBlockInErasing = tRecordManageParameterp[i+1].tUsedBlocks[0].ucBlockNum;
BlockErase(ucBlockInErasing); //找到一个Dirty扇区，就开始擦除
tRecordManageParameterp[i+1].tUsedBlocks[0].ucBlockStatus = BLOCK_ERASING;
PRINT_TRACE(Debug)("******The %d block will be erased \n", ucBlockInErasing);
return;
}
else if (tRecordManageParameterp[i+1].tUsedBlocks[1].ucBlockStatus == BLOCK_IS_DIRTY)
{
ucBlockInErasing = tRecordManageParameterp[i+1].tUsedBlocks[1].ucBlockNum;
BlockErase(ucBlockInErasing); //找到一个Dirty扇区，就开始擦除
tRecordManageParameterp[i+1].tUsedBlocks[1].ucBlockStatus = BLOCK_ERASING;
PRINT_TRACE(Debug)("******The %d block will be erased \n", ucBlockInErasing);
return;
}
}
}
//没有找到一个Dirty扇区，或者没在读取状态下，便设置下次调用为 200ms 以后
erase_timer.data = ERASE_CHECK_PERIOD;
erase_timer.expires = jiffies + erase_timer.data;
add_timer(&erase_timer);
}
/****************************************************/
/*函数名称:ReadCFI */
/*函数功能:读取flash的功能flash接口 */
/*输入参数: N/A */
/* */
/*输出参数: N/A */
/*修改记录: */
/****************************************************/
static void ReadCFI(void)
{
unsigned char i,j,k;
unsigned int FlashSize;
unsigned short *p, number, blocksize;
/* 读取CFI 信息 */
/* 1, 先写入控制命令*/
*(data_flash_base + ADDR_CFI_READ) = CMD_CFI_READ;
/* 2, 读取CFI内容*/
CFIident.qry[0] = *(data_flash_base + 0x10);
CFIident.qry[1] = *(data_flash_base + 0x11);
CFIident.qry[2] = *(data_flash_base + 0x12);
if ((CFIident.qry[0] == 'Q') || (CFIident.qry[1] == 'R') ||(CFIident.qry[2] == 'Y'))
{
/*继续读取CFI identify*/
CFIident.P_ID = *(data_flash_base + 0x13);
CFIident.P_ADR = *(data_flash_base + 0x15);
CFIident.DevSize = *(data_flash_base + 0x27);
CFIident.InterfaceDesc = *(data_flash_base + 0x28);
CFIident.MaxBufWriteSize = *(data_flash_base + 0x2A);
CFIident.NumEraseRegions = *(data_flash_base + 0x2C);
CFIident.NumFirstRegion = ((*(data_flash_base + 0x2E))<<8) + (*(data_flash_base + 0x2D));
CFIident.SizeFirstRegion = ((*(data_flash_base + 0x30))<<8) + (*(data_flash_base + 0x2F));
CFIident.NumSecondRegion = ((*(data_flash_base + 0x32))<<8) + (*(data_flash_base + 0x31));
CFIident.SizeSecondRegion = ((*(data_flash_base + 0x34))<<8) + (*(data_flash_base + 0x33));
CFIident.NumThirdRegion = ((*(data_flash_base + 0x36))<<8) + (*(data_flash_base + 0x35));
CFIident.SizeThirdRegion = ((*(data_flash_base + 0x38))<<8) + (*(data_flash_base + 0x37));
CFIident.NumFouthRegion = ((*(data_flash_base + 0x3a))<<8) + (*(data_flash_base + 0x39));
CFIident.SizeFouthRegion = ((*(data_flash_base + 0x3c))<<8) + (*(data_flash_base + 0x3b));
/*继续读取CFI system*/
CFIsys.TyProgram = *(data_flash_base + 0x1F);
CFIsys.TyBlkErase = *(data_flash_base + 0x21);
CFIsys.TyChipErase = *(data_flash_base + 0x22);
CFIsys.MaxProgrom = *(data_flash_base + 0x23);
CFIsys.MaxBlkErase = *(data_flash_base + 0x25);
CFIsys.MaxChipErase = *(data_flash_base + 0x26);
/*继续读取CFI pri*/
CFIpri.pri[0] = *(data_flash_base + 0x40);
CFIpri.pri[1] = *(data_flash_base + 0x41);
CFIpri.pri[2] = *(data_flash_base + 0x42);
CFIpri.MajorVersion = *(data_flash_base + 0x43);
CFIpri.MinorVersion = *(data_flash_base + 0x44);
CFIpri.EraseSuspend = *(data_flash_base + 0x46);
CFIpri.TopBottomType = *(data_flash_base + 0x4F);
////////////////////////////////////
//打印Flash的基本信息
PRINT_TRACE(Debug)(" ========================================= \n");
PRINT_TRACE(Debug)(" Flash Information (Support CFI interface) \n");
PRINT_TRACE(Debug)(" ========================================= \n");
PRINT_TRACE(Debug)(" 1, Algorithm type: %d \n", CFIident.P_ID);
PRINT_TRACE(Debug)(" 2, Flash Bus type: %d (0:8 1:16 2:8,16) \n", CFIident.InterfaceDesc);
PRINT_TRACE(Debug)(" 3, Flash Size : %d %d bytes \n", CFIident.DevSize,uiPower(2,CFIident.DevSize));
PRINT_TRACE(Debug)(" 4, Flsh Boot type: %d (0:None 2:B 3:T) \n", CFIpri.TopBottomType);
PRINT_TRACE(Debug)(" 5, Flash Erase Sus: %d (0:None 1:OR 2:RW) \n", CFIpri.EraseSuspend);
PRINT_TRACE(Debug)(" 6, Block Regions: %d \n", CFIident.NumEraseRegions);
PRINT_TRACE(Debug)(" 7, 1nd Region Num: %d \n", CFIident.NumFirstRegion+1);
PRINT_TRACE(Debug)(" 8, 1nd Region Size: %d \n", CFIident.SizeFirstRegion * 256);
PRINT_TRACE(Debug)(" 9, 2nd Region Num: %d \n", CFIident.NumSecondRegion+1);
PRINT_TRACE(Debug)(" a, 2nd Region Size: %d \n", CFIident.SizeSecondRegion * 256);
PRINT_TRACE(Debug)(" b, 3nd Region Num: %d \n", CFIident.NumThirdRegion+1);
PRINT_TRACE(Debug)(" c, 3nd Region Size: %d \n", CFIident.SizeThirdRegion * 256);
PRINT_TRACE(Debug)(" d, 4nd Region Num: %d \n", CFIident.NumFouthRegion+1);
PRINT_TRACE(Debug)(" e, 4nd Region Size: %d \n", CFIident.SizeFouthRegion * 256);
PRINT_TRACE(Debug)(" f, Type Prg time: %d %d us \n", CFIsys.TyProgram,uiPower(2,CFIsys.TyProgram));
PRINT_TRACE(Debug)(" g, Type B Er time: %d %d ms \n", CFIsys.TyBlkErase,uiPower(2,CFIsys.TyBlkErase));
PRINT_TRACE(Debug)(" h, Type C Er time: %d %d ms \n", CFIsys.TyChipErase,uiPower(2,CFIsys.TyChipErase));
PRINT_TRACE(Debug)(" i, Max Prg time: %d %d us \n", CFIsys.MaxProgrom,uiPower(2,CFIsys.TyProgram) * uiPower(2,CFIsys.MaxProgrom));
PRINT_TRACE(Debug)(" j, Max B Er time: %d %d ms \n", CFIsys.MaxBlkErase,uiPower(2,CFIsys.TyBlkErase) * uiPower(2,CFIsys.MaxBlkErase));
PRINT_TRACE(Debug)(" k, Max C Er time: %d %d ms \n", CFIsys.MaxChipErase,uiPower(2,CFIsys.MaxChipErase));
PRINT_TRACE(Debug)(" ========================================= \n");
/***************************************************/
/*算出每个Block的起始地址 --- TBD*/
/***************************************************/
for (i=0; i<200; i++)
{
BlockSizeList[i] = 0;
uiBlockOffsetAddr[i] = 0;
}
p = (unsigned short *)(&CFIident.NumFirstRegion);
k = 0;
for (i=0; i<4; i++)
{
number = *(p + 2*i) + 1;
blocksize = *(p + 2*i +1);
for (j=0; j<number; j++)
{
BlockSizeList[k++] = 256 * blocksize; //单位为short int型
}
}
FlashSize = uiPower(2,CFIident.DevSize);
if (CFIpri.TopBottomType == BOTTOM_FLASH)
{
uiBlockOffsetAddr[0] = 0x00;
for (i=1; i<200; i++)
{
uiBlockOffsetAddr[i] = uiBlockOffsetAddr[i-1] + BlockSizeList[i-1];
}
}
else if (CFIpri.TopBottomType == TOP_FLASH)
{
uiBlockOffsetAddr[0] = FlashSize - BlockSizeList[0];
for (i=1; i<200; i++)
{
uiBlockOffsetAddr[i] = uiBlockOffsetAddr[i-1] - BlockSizeList[i];
}
}
//要求下面两个数组的单位必须是INT16
for (i=0; i<200; i++)
{
BlockSizeList[i] = (BlockSizeList[i] >> 1);
uiBlockOffsetAddr[i] = (uiBlockOffsetAddr[i] >> 1);
}
for (i=0; i<200; i++)
{
PRINT_TRACE(Debug)(" %d block offset is %d\n",i,uiBlockOffsetAddr[i]);
}
Send_CMD(CMD_RESET_DATA);
//Flash状态处于读
ucFlashStatus = READING;
}
else
{
PRINT_TRACE(Debug)("This flash is not a CFI standard device.\n");
}
}
/****************************************************/
/*函数名称:Send_CMD */
/*函数功能:向flash接口发送指定的命令 */
/*输入参数: cmd */
/* */
/*输出参数: N/A */
/*修改记录: */
/****************************************************/
static void Send_CMD(unsigned char cmd)
{
switch (cmd)
{
case CMD_RESET_DATA:
{
*(data_flash_base + ADDR_UNLOCK_1) = CMD_UNLOCK_DATA_1;
*(data_flash_base + ADDR_UNLOCK_2) = CMD_UNLOCK_DATA_2;
*(data_flash_base + ADDR_UNLOCK_2) = CMD_RESET_DATA;
break;
}
case CMD_MANUFACTURER_UNLOCK_DATA:
{
*(data_flash_base + ADDR_UNLOCK_1) = CMD_UNLOCK_DATA_1;
*(data_flash_base + ADDR_UNLOCK_2) = CMD_UNLOCK_DATA_2;
*(data_flash_base + ADDR_UNLOCK_1) = CMD_MANUFACTURER_UNLOCK_DATA;
break;
}
case CMD_PROGRAM_UNLOCK_DATA:
{
*(data_flash_base + ADDR_UNLOCK_1) = CMD_UNLOCK_DATA_1;
*(data_flash_base + ADDR_UNLOCK_2) = CMD_UNLOCK_DATA_2;
*(data_flash_base + ADDR_UNLOCK_1) = CMD_PROGRAM_UNLOCK_DATA;
break;
}
case CMD_SECTOR_ERASE_UNLOCK_DATA:
{
*(data_flash_base + ADDR_UNLOCK_1) = CMD_UNLOCK_DATA_1;
*(data_flash_base + ADDR_UNLOCK_2) = CMD_UNLOCK_DATA_2;
*(data_flash_base + ADDR_UNLOCK_1) = CMD_CHIP_SECTOR_ERASE;
*(data_flash_base + ADDR_UNLOCK_1) = CMD_UNLOCK_DATA_1;
*(data_flash_base + ADDR_UNLOCK_2) = CMD_UNLOCK_DATA_2;
break;
}
case CMD_CHIP_ERASE_UNLOCK_DATA:
{
*(data_flash_base + ADDR_UNLOCK_1) = CMD_UNLOCK_DATA_1;
*(data_flash_base + ADDR_UNLOCK_2) = CMD_UNLOCK_DATA_2;
*(data_flash_base + ADDR_UNLOCK_1) = CMD_CHIP_SECTOR_ERASE;
*(data_flash_base + ADDR_UNLOCK_1) = CMD_UNLOCK_DATA_1;
*(data_flash_base + ADDR_UNLOCK_2) = CMD_UNLOCK_DATA_2;
*(data_flash_base + ADDR_UNLOCK_1) = CMD_CHIP_ERASE_UNLOCK_DATA;
break;
}
default:
printk("Unvalid Flash CMD\n");
break;
}
}
/****************************************************/
/*函数名称:ChipErase */
/*函数功能:Erase the entire chip */
/*输入参数: N/A */
/* */
/*输出参数: N/A */
/*修改记录: */
/****************************************************/
static void ChipErase(void)
{
unsigned char ret;
Send_CMD(CMD_CHIP_ERASE_UNLOCK_DATA); /*Send a chip erase command*/
ucFlashStatus = CHIPERASING; /*Register a chiperaseing status*/
uiErase200msCnt = 1; /*Start a 100ms counter*/
del_timer_sync(&erase_timer);
init_timer(&erase_timer);
erase_timer.function = erase_state_poll;
erase_timer.data = ERASE_CHECK_PERIOD; /*check state per 100ms*/
erase_timer.expires = jiffies + erase_timer.data;
add_timer(&erase_timer);
return;
}
/****************************************************/
/*函数名称:BlockErase */
/*函数功能:Erase the designated block */
/*输入参数: */
/* No: the Block Number */
/*输出参数: N/A */
/*修改记录: */
/****************************************************/
static void BlockErase(unsigned short No)
{
unsigned char ret;
//unsigned short TypeBlockEraseTime;
Send_CMD(CMD_RESET_DATA); /*Send a reset common command*/
Send_CMD(CMD_SECTOR_ERASE_UNLOCK_DATA); /*Send a block erase common command*/
*(data_flash_base + uiBlockOffsetAddr[No]) = CMD_SECTOR_ERASE_UNLOCK_DATA;
ucFlashStatus = BLOCKERASING; /*Register a chiperaseing status*/
uiErase200msCnt = 1; /*Start a 100ms counter*/
//TypeBlockEraseTime = uiPower(2,CFIsys.TyBlkErase);
del_timer_sync(&erase_timer);
init_timer(&erase_timer);
erase_timer.function = erase_state_poll;
erase_timer.data = ERASE_CHECK_PERIOD;
erase_timer.expires = jiffies + erase_timer.data;
add_timer(&erase_timer);
return;
}
/****************************************************/
/*函数名称:RecordDataBlockErase */
/*函数功能:Erase the record block */
/*输入参数: */
/* No: the Block Number */
/*输出参数: N/A */
/*修改记录: */
/****************************************************/
static void RecordDataBlockErase(unsigned short uBlockSeclect)
{
if (uBlockSeclect>1)
{
uBlockSeclect = 0;
}
unsigned char ucBlockWillErasing = tRecordManageParameterp[EVENT_RECORD].tUsedBlocks[uBlockSeclect].ucBlockNum;
//for test
printk ("--flash:will erase block= %d--\n", ucBlockWillErasing);
BlockErase(ucBlockWillErasing);
return;
}
/****************************************************/
/*函数名称:EraseSuspend */
/*函数功能:Erase process is pending */
/*输入参数: N/A */
/*输出参数: N/A */
/*修改记录: */
/****************************************************/
static void EraseSuspend(void)
{
unsigned char ret;
if ((ucFlashStatus == BLOCKERASING) || (ucFlashStatus == CHIPERASING))
{
*(data_flash_base + ADDR_UNLOCK_1) = CMD_ERASE_SUSPEND;
ucFlashStatus = ERASEPENDING; /*Register a erase pending status*/
/*停止计数检查*/
del_timer_sync(&erase_timer);
}
else
{
PRINT_TRACE(Debug)("Flash is not in erase process\n");
}
return;
}
/****************************************************/
/*函数名称:EraseResume */
/*函数功能:Erase process to be continued */
/*输入参数: N/A */
/*输出参数: N/A */
/*修改记录: */
/****************************************************/
static void EraseResume(void)
{
unsigned char ret;
if (ucFlashStatus == ERASEPENDING)
{
*(data_flash_base + ADDR_UNLOCK_1) = CMD_ERASE_RESUME;
ucFlashStatus = BLOCKERASING; /*Register a block erase status*/
/*继续计数检查*/
init_timer(&erase_timer);
erase_timer.function = erase_state_poll;
erase_timer.data = ERASE_CHECK_PERIOD;
erase_timer.expires = jiffies + erase_timer.data;
add_timer(&erase_timer);
}
else
{
PRINT_TRACE(Debug)("Flash is not in erase pending process\n");
}
return;
}
/****************************************************/
/*函数名称:ReadByte */
/*函数功能:Read a bytes from Flash */
/*输入参数: */
/* addr: start address of flash */
/*输出参数: */
/* value: result of this byte */
/*修改记录: */
/****************************************************/
static unsigned char ReadByte(unsigned int addr)
{
if ((addr & 0x01) == 0x01)
{
return ((*(data_flash_base + (addr >> 1))) >> 8) ;
}
else
{
return ((*(data_flash_base + (addr >> 1))) & 0xFF) ;
}
}
/****************************************************/
/*函数名称:ReadWord */
/*函数功能:Read a short int data from Flash */
/*输入参数: */
/* addr: the offset of flash addr */
/* per a short int type */
/*输出参数: */
/* value: result of this short int */
/*修改记录: */
/****************************************************/
static inline unsigned short ReadWord(unsigned int addr)
{
return *(data_flash_base + addr);
}
/****************************************************/
/*函数名称:WriteWord */
/*函数功能:Write a short int data from Flash */
/*输入参数: */
/* addr: the offset of flash addr */
/* per a short int type */
/* data: the data to be writen */
/*输出参数: */
/* result: successful or fail */
/*修改记录: */
/****************************************************/
static unsigned char WriteWord(unsigned int addr, unsigned short data)
{
unsigned short status1, status2;
unsigned char i, Maxtimes, TypeT, result;
// unsigned char ucFlashStatusBak;
// printk("The addr is %d , data is %d\n", addr, data);
// ucFlashStatusBak = ucFlashStatus;
// ucFlashStatus = PROGRAMING; /*Register a programming status*/
/*发送编程命令*/
*(data_flash_base + ADDR_UNLOCK_1) = CMD_UNLOCK_DATA_1;
*(data_flash_base + ADDR_UNLOCK_2) = CMD_UNLOCK_DATA_2;
*(data_flash_base + ADDR_UNLOCK_1) = CMD_PROGRAM_UNLOCK_DATA;
*(data_flash_base + addr) = data;
/*算出典型的编程时间以及最大等待循环*/
TypeT = uiPower(2,CFIsys.TyProgram);
Maxtimes = uiPower(2,CFIsys.MaxProgrom);
udelay(TypeT);