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modified for mcp nand

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This commit is contained in:
黄心宇
2010-06-03 03:46:56 +00:00
committed by 黄涛
parent e221fe7e0a
commit a130ff45c1
1 changed files with 21 additions and 2 deletions
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23
drivers/mtd/nand/rk2818_nand.c
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@@ -37,6 +37,7 @@
#define PROGRAM_BUSY_COUNT 10000
#define ERASE_BUSY_COUNT 20000
#define READ_BUSY_COUNT 5000
#define RESET_BUSY_COUNT 20000
/* Define delays in microsec for NAND device operations */
#define TROP_US_DELAY 2000
@@ -312,6 +313,7 @@ static void rk2818_nand_cmdfunc(struct mtd_info *mtd, unsigned command,int colum
}
rk2818_nand_wait_busy(mtd,READ_BUSY_COUNT);
break;
case NAND_CMD_READ0:
@@ -350,8 +352,8 @@ static void rk2818_nand_cmdfunc(struct mtd_info *mtd, unsigned command,int colum
{
if ( column>= 0 )
{
pRK28NC ->chip[master->cs].addr = (column + mtd->writesize) & 0xff;
pRK28NC ->chip[master->cs].addr = ( (column + mtd->writesize) >> 8) & 0xff;
pRK28NC ->chip[master->cs].addr = column & 0xff;
pRK28NC ->chip[master->cs].addr = ( column >> 8) & 0xff;
}
if ( page_addr>=0 )
{
@@ -434,10 +436,27 @@ static void rk2818_nand_cmdfunc(struct mtd_info *mtd, unsigned command,int colum
case NAND_CMD_STATUS:
pRK28NC ->BCHCTL = 0x0;
pRK28NC ->chip[master->cs].cmd = command;
while (timeout>0)
{
timeout --;
udelay(1);
if(pRK28NC->FLCTL&FL_INTCLR)
break;
}
break;
case NAND_CMD_RESET:
pRK28NC ->chip[master->cs].cmd = command;
while (timeout>0)
{
timeout --;
udelay(1);
if(pRK28NC->FLCTL&FL_INTCLR)
break;
}
rk2818_nand_wait_busy(mtd,RESET_BUSY_COUNT);
break;
/* This applies to read commands */