211 lines
6.7 KiB
C
211 lines
6.7 KiB
C
|
/*
|
||
|
|
* pm49fl004.c: driver for Pm49FL004 flash models.
|
||
|
|
*
|
||
|
|
*
|
||
|
|
* Copyright 2004 Tyan Corporation
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU General Public License as published by
|
||
|
|
* the Free Software Foundation; either version 2 of the License, or
|
||
|
|
* (at your option) any later version.
|
||
|
|
*
|
||
|
|
* This program is distributed in the hope that it will be useful,
|
||
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
* GNU General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License
|
||
|
|
* along with this program; if not, write to the Free Software
|
||
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||
|
|
*
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <stdio.h>
|
||
|
|
#include "flash.h"
|
||
|
|
#include "jedec.h"
|
||
|
|
#include "pm49fl004.h"
|
||
|
|
|
||
|
|
#define AUTO_PGRM 0x10
|
||
|
|
#define CHIP_ERASE 0x30
|
||
|
|
#define RESET 0xFF
|
||
|
|
#define READ_ID 0x90
|
||
|
|
|
||
|
|
static __inline__ void protect_49fl004 (volatile char * bios)
|
||
|
|
{
|
||
|
|
/* ask compiler not to optimize this */
|
||
|
|
volatile unsigned char tmp;
|
||
|
|
|
||
|
|
tmp = *(volatile unsigned char *) (bios + 0x1823);
|
||
|
|
tmp = *(volatile unsigned char *) (bios + 0x1820);
|
||
|
|
tmp = *(volatile unsigned char *) (bios + 0x1822);
|
||
|
|
tmp = *(volatile unsigned char *) (bios + 0x0418);
|
||
|
|
tmp = *(volatile unsigned char *) (bios + 0x041B);
|
||
|
|
tmp = *(volatile unsigned char *) (bios + 0x0419);
|
||
|
|
tmp = *(volatile unsigned char *) (bios + 0x040A);
|
||
|
|
}
|
||
|
|
|
||
|
|
static __inline__ void unprotect_49fl004 (volatile char * bios)
|
||
|
|
{
|
||
|
|
/* ask compiler not to optimize this */
|
||
|
|
volatile unsigned char tmp;
|
||
|
|
|
||
|
|
tmp = *(volatile unsigned char *) (bios + 0x1823);
|
||
|
|
tmp = *(volatile unsigned char *) (bios + 0x1820);
|
||
|
|
tmp = *(volatile unsigned char *) (bios + 0x1822);
|
||
|
|
tmp = *(volatile unsigned char *) (bios + 0x0418);
|
||
|
|
tmp = *(volatile unsigned char *) (bios + 0x041B);
|
||
|
|
tmp = *(volatile unsigned char *) (bios + 0x0419);
|
||
|
|
tmp = *(volatile unsigned char *) (bios + 0x041A);
|
||
|
|
}
|
||
|
|
|
||
|
|
static __inline__ int erase_block_49fl004 ( volatile unsigned char * bios ,unsigned long address)
|
||
|
|
{
|
||
|
|
volatile unsigned char *Temp;
|
||
|
|
|
||
|
|
Temp = bios + 0x5555; /* set up address to be C000:5555h */
|
||
|
|
*Temp = 0xAA; /* write data 0xAA to the address */
|
||
|
|
myusec_delay(10);
|
||
|
|
Temp = bios + 0x2AAA; /* set up address to be C000:2AAAh */
|
||
|
|
*Temp = 0x55; /* write data 0x55 to the address */
|
||
|
|
myusec_delay(10);
|
||
|
|
Temp = bios + 0x5555; /* set up address to be C000:5555h */
|
||
|
|
*Temp = 0x80; /* write data 0x80 to the address */
|
||
|
|
myusec_delay(10);
|
||
|
|
Temp = bios + 0x5555; /* set up address to be C000:5555h */
|
||
|
|
*Temp = 0xAA; /* write data 0xAA to the address */
|
||
|
|
myusec_delay(10);
|
||
|
|
Temp = bios + 0x2AAA; /* set up address to be C000:2AAAh */
|
||
|
|
*Temp = 0x55; /* write data 0x55 to the address */
|
||
|
|
myusec_delay(10);
|
||
|
|
Temp = bios + address; /* set up address to be C000:5555h */
|
||
|
|
*Temp = 0x50; /* write data 0x55 to the address */
|
||
|
|
|
||
|
|
/* wait for Toggle bit ready */
|
||
|
|
toggle_ready_jedec(bios);
|
||
|
|
|
||
|
|
return(0);
|
||
|
|
}
|
||
|
|
static __inline__ int write_block_49fl004(volatile char * bios,
|
||
|
|
unsigned char * src,
|
||
|
|
volatile unsigned char * dst,
|
||
|
|
unsigned int page_size)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
volatile char *Temp;
|
||
|
|
|
||
|
|
for (i = 0; i < page_size; i++) {
|
||
|
|
if (*dst != 0xff) {
|
||
|
|
printf("FATAL: dst %p not erased (val 0x%x\n", dst, *dst);
|
||
|
|
return(-1);
|
||
|
|
}
|
||
|
|
/* transfer data from source to destination */
|
||
|
|
if (*src == 0xFF) {
|
||
|
|
dst++, src++;
|
||
|
|
/* If the data is 0xFF, don't program it */
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
Temp = (bios + 0x5555);
|
||
|
|
*Temp = 0xAA;
|
||
|
|
Temp = bios + 0x2AAA;
|
||
|
|
*Temp = 0x55;
|
||
|
|
Temp = bios + 0x5555;
|
||
|
|
*Temp = 0xA0;
|
||
|
|
*dst = *src;
|
||
|
|
toggle_ready_jedec(bios);
|
||
|
|
if (*dst != *src)
|
||
|
|
printf("BAD! dst 0x%lx val 0x%x src 0x%x\n",
|
||
|
|
(unsigned long)dst, *dst, *src);
|
||
|
|
dst++, src++;
|
||
|
|
}
|
||
|
|
|
||
|
|
return(0);
|
||
|
|
}
|
||
|
|
|
||
|
|
int probe_49fl004 (struct flashchip * flash)
|
||
|
|
{
|
||
|
|
volatile char * bios = flash->virt_addr;
|
||
|
|
unsigned char id1, id2;
|
||
|
|
|
||
|
|
*(volatile char *) (bios + 0x5555) = 0xAA;
|
||
|
|
myusec_delay(10);
|
||
|
|
*(volatile char *) (bios + 0x2AAA) = 0x55;
|
||
|
|
myusec_delay(10);
|
||
|
|
*(volatile char *) (bios + 0x5555) = 0x90;
|
||
|
|
|
||
|
|
myusec_delay(10);
|
||
|
|
|
||
|
|
id1 = *(volatile unsigned char *) bios;
|
||
|
|
id2 = *(volatile unsigned char *) (bios + 0x01);
|
||
|
|
|
||
|
|
*(volatile char *) (bios + 0x5555) = 0xAA;
|
||
|
|
*(volatile char *) (bios + 0x2AAA) = 0x55;
|
||
|
|
*(volatile char *) (bios + 0x5555) = 0xF0;
|
||
|
|
|
||
|
|
myusec_delay(10);
|
||
|
|
|
||
|
|
printf("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, id1, id2);
|
||
|
|
|
||
|
|
if (id1 == flash->manufacture_id && id2 == flash->model_id)
|
||
|
|
return 1;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int erase_49fl004 (struct flashchip * flash)
|
||
|
|
{
|
||
|
|
volatile unsigned char * bios = flash->virt_addr;
|
||
|
|
volatile unsigned char *Temp;
|
||
|
|
|
||
|
|
Temp = bios + 0x5555; /* set up address to be C000:5555h */
|
||
|
|
*Temp = 0xAA; /* write data 0xAA to the address */
|
||
|
|
myusec_delay(10);
|
||
|
|
Temp = bios + 0x2AAA; /* set up address to be C000:2AAAh */
|
||
|
|
*Temp = 0x55; /* write data 0x55 to the address */
|
||
|
|
myusec_delay(10);
|
||
|
|
Temp = bios + 0x5555; /* set up address to be C000:5555h */
|
||
|
|
*Temp = 0x80; /* write data 0x80 to the address */
|
||
|
|
myusec_delay(10);
|
||
|
|
Temp = bios + 0x5555; /* set up address to be C000:5555h */
|
||
|
|
*Temp = 0xAA; /* write data 0xAA to the address */
|
||
|
|
myusec_delay(10);
|
||
|
|
Temp = bios + 0x2AAA; /* set up address to be C000:2AAAh */
|
||
|
|
*Temp = 0x55; /* write data 0x55 to the address */
|
||
|
|
myusec_delay(10);
|
||
|
|
Temp = bios + 0x5555; /* set up address to be C000:5555h */
|
||
|
|
*Temp = 0x10; /* write data 0x10 to the address */
|
||
|
|
|
||
|
|
|
||
|
|
/* wait for Toggle bit ready */
|
||
|
|
toggle_ready_jedec(bios);
|
||
|
|
|
||
|
|
return(0);
|
||
|
|
}
|
||
|
|
|
||
|
|
int write_49fl004 (struct flashchip * flash, unsigned char * buf)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
int total_size = flash->total_size * 1024, page_size = flash->page_size;
|
||
|
|
volatile char * bios = flash->virt_addr;
|
||
|
|
|
||
|
|
// unprotect_49fl004 (bios);
|
||
|
|
// erase_49fl004(flash);
|
||
|
|
printf ("Programming Page: ");
|
||
|
|
for (i = 0; i < total_size/page_size; i++) {
|
||
|
|
/* erase the page before programming */
|
||
|
|
erase_block_49fl004(bios, i * page_size);
|
||
|
|
|
||
|
|
/* write to the sector */
|
||
|
|
printf ("%04d at address: 0x%08x", i, i * page_size);
|
||
|
|
write_block_49fl004(bios, buf + i * page_size, bios + i * page_size,
|
||
|
|
page_size);
|
||
|
|
printf ("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
|
||
|
|
fflush(stdout);
|
||
|
|
}
|
||
|
|
printf("\n");
|
||
|
|
|
||
|
|
// protect_49fl004 (bios);
|
||
|
|
|
||
|
|
return(0);
|
||
|
|
}
|