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#include <asm/semaphore.h>
#include <linux/errno.h>
#include <linux/module.h>
#include <linux/config.h>
#include <linux/major.h>
#include <linux/slab.h>
#include <asm/fcntl.h>
#include <asm/unistd.h>
#include <asm/uaccess.h>
#include <asm/arch/flash.h>
#include <asm/arch/bib.h>
#include <linux/init.h>
#include "cfi.h"
static int Init_WinbondFlash(void);
#define BL_PHY 0
#define BL_IC_PLUS 1
#define BL_MARVELL6052 2
tbl_info info;
DECLARE_MUTEX(spare_lock);
#define _DEBUG
#undef _DEBUG
#define MALLOC(x) kmalloc((x), GFP_KERNEL)
#define FREE kfree
#define MEMCPY memcpy //or use "copy_to_user"
//yyang1 030605 ???
int __init Init_WinbondFlash(void)
{
if (cfiGetFlashInfo() == -1) {
printk("No supported flash detected!\n");
return -EINVAL;
}
return 0;
}
asmlinkage int sys_ReadWinbondFlash(unsigned long pos, unsigned long length, char * buffer)
{
// if(!pCurFlash)
// return -EINVAL;
if(cfiGetFlashSize() <= 0)
return(-EINVAL);
#ifdef _DEBUG
printk("\nWinbondFlash Read: pos = %x, length = %d, buffer = 0x%x.\n", pos, length, buffer);
#endif
if(length%2)
length++;
down(&spare_lock);
if(copy_to_user(buffer, (void*)(FLASH_BASE | pos), length))
{
up(&spare_lock);
return -EFAULT;
}
up(&spare_lock);
return length;
}
static int _FlashWrite(char *pcBuf, int iBufLen, int iOffset);
asmlinkage int sys_WriteWinbondFlash(unsigned long pos, unsigned long length, char * buffer)
{
// if(!pCurFlash)
// return -EINVAL;;
if(cfiGetFlashSize() <= 0)
return(-EINVAL);
#ifdef _DEBUG
printk("\nWinbondFlash Write: pos = %x, length = %d, buffer = 0x%x.\n", pos, length, buffer);
#endif
return _FlashWrite(buffer, length, pos);
}
asmlinkage int sys_WinbondFlashBlockSize(unsigned long pos)
{
if(cfiGetFlashSize() == 0)
return -EINVAL;;
#ifdef _DEBUG
printk("\nWinbondFlash BlockSize: pos = %d.\n", pos);
#endif
pos |= FLASH_BASE;
return cfiGetBlockSize(pos);
}
asmlinkage int sys_WinbondFlashTotalSize(void)
{
printk("sys_WinbondFlashTotalSize\n");
return cfiGetFlashSize();
}
asmlinkage int sys_WinbondFlashBase(void)
{
return FLASH_BASE;
}
static int _FlashWrite(char *pcBuf, int iBufLen, int iOffset)
{
// unsigned long flags;
UINT32 blockSize,src,dest;
INT i;
if (cfiGetFlashSize() == 0) return -EINVAL;
#ifdef _DEBUG
printk("\nWinbondFlash _FlashWrite: pos = %x, length = %d, buffer = 0x%x.\n", iOffset, iBufLen, pcBuf);
#endif
//i = iBufLen;
i=(iBufLen%2)?(iBufLen+1):iBufLen;
src = (UINT32)pcBuf;
dest = (iOffset%2)?(iOffset+1):iOffset | FLASH_BASE;
//CSR_WRITE(WTCR, (CSR_READ(WTCR)&0xF7)|0x01);//clyu reset watch dog
while (i>0)
{
volatile UINT32 buf;
volatile UINT32 addr;
UINT32 count;
int len;
blockSize = cfiGetBlockSize(dest);
if(blockSize<=0)
return 0;
#ifdef _DEBUG
//#if 1
printk("\n_FlashWrite:dest:%x,cur blockSize:%x\n",dest,blockSize);
#endif
addr=dest&~(blockSize-1);
for(len=0;len<i&&(len+dest-addr)<blockSize;len+=2)
if(inph((dest+len))!=0xFFFF)
{
#ifdef _DEBUG
printk("01 inph(%x):%x\n",dest+len,inph(dest+len));
#endif
if((dest&(blockSize-1))||(dest+i-addr)<=blockSize)
{
buf=(UINT32)MALLOC(blockSize);
if(buf != 0)
{
#ifdef _DEBUG
printk("\n_FlashWrite:dest:%x,addr:%x,buf:%x\n",dest,addr,buf);
#endif
//memset((UCHAR *)buf,0xFF,blockSize);
MEMCPY((UCHAR *)buf,(UCHAR *)addr,blockSize);
//MEMCPY((UCHAR *)buf,(UCHAR *)addr,dest-addr);
if(i<blockSize-(dest-addr))
count=i;
else
count=blockSize-(dest-addr);
#ifdef _DEBUG
printk("\n_FlashWrite:i:%d,count:%d,dest:%x,addr:%x,len:%d\n",i,count,dest,addr,len);
#endif
MEMCPY((void *)(buf+(dest-addr)),(void *)src,count);
down(&spare_lock);
//save_flags(flags); cli();//prevent closing watch dog interrupt
#ifdef _DEBUG
printk("%s:%d BlockErase,%x\n",__FILE__,__LINE__,inph(dest+len));
#endif
cfiCmd.erase(addr, blockSize);
#ifdef _DEBUG
printk("02 inph(%x):%x\n",dest+len,inph(dest+len));
printk("%s:%d BlockWrite\n",__FILE__,__LINE__);
#endif
cfiCmd.write(addr, (UCHAR *)buf, blockSize);
#ifdef _DEBUG
printk("03 inph(%x):%x\n",dest+len,inph(dest+len));
#endif
//restore_flags(flags);
up(&spare_lock);
FREE((void *)buf);
blockSize = count;
}
else
{
return (iBufLen - i);
}
}
else
{
down(&spare_lock);
//save_flags(flags); cli();
#ifdef _DEBUG
printk("\nb_FlashWrite:i:%d,count:%d,dest:%x,addr:%x,%x\n",i,count,dest,addr,inph(dest+len));
#endif
cfiCmd.erase(dest, blockSize);
cfiCmd.write(dest, (UCHAR *)src, blockSize);
//restore_flags(flags);
up(&spare_lock);
}
break;
}
if((len>=i)||((len+dest-addr)>=cfiGetBlockSize(dest)))
{
if((dest&(blockSize-1))||(dest+i-addr)<=blockSize)
{
#ifdef _DEBUG
printk("Write direct\n");
#endif
if(i<blockSize-(dest-addr))
count=i;
else
count=blockSize-(dest-addr);
down(&spare_lock);
//save_flags(flags); cli();
cfiCmd.write(dest, (UCHAR *)src, count);
//restore_flags(flags);
up(&spare_lock);
blockSize=count;
}
else
{
#ifdef _DEBUG
printk("Write direct one block\n");
#endif
down(&spare_lock);
//save_flags(flags); cli();
cfiCmd.write(dest, (UCHAR *)src, blockSize);
//restore_flags(flags);
up(&spare_lock);
}
}
src+=blockSize;
dest+=blockSize;
i-=blockSize;
}
return (iBufLen);
}
module_init(Init_WinbondFlash);
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