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/*
* jedec.c: driver for programming JEDEC standard flash parts
*
*
* Copyright 2000 Silicon Integrated System Corporation
* Copyright 2006 Giampiero Giancipoli <gianci@email.it>
* Copyright 2006 coresystems GmbH <info@coresystems.de>
*
* 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.
*
*
* Reference:
*
*/
#include <stdio.h>
#include <stdint.h>
#include "flash.h"
#include "jedec.h"
#include "debug.h"
#define MAX_REFLASH_TRIES 0x10
int probe_jedec(struct flashchip *flash)
{
volatile uint8_t *bios = flash->virtual_memory;
uint8_t id1, id2;
/* Issue JEDEC Product ID Entry command */
*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
myusec_delay(10);
*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
myusec_delay(10);
*(volatile uint8_t *)(bios + 0x5555) = 0x90;
myusec_delay(10);
/* Read product ID */
id1 = *(volatile uint8_t *)bios;
id2 = *(volatile uint8_t *)(bios + 0x01);
/* Issue JEDEC Product ID Exit command */
*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
myusec_delay(10);
*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
myusec_delay(10);
*(volatile uint8_t *)(bios + 0x5555) = 0xF0;
myusec_delay(10);
printf_debug("%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_sector_jedec(volatile uint8_t *bios, unsigned int page)
{
/* Issue the Sector Erase command */
*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
myusec_delay(10);
*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
myusec_delay(10);
*(volatile uint8_t *)(bios + 0x5555) = 0x80;
myusec_delay(10);
*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
myusec_delay(10);
*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
myusec_delay(10);
*(volatile uint8_t *)(bios + page) = 0x30;
myusec_delay(10);
/* wait for Toggle bit ready */
toggle_ready_jedec(bios);
return (0);
}
int erase_block_jedec(volatile uint8_t *bios, unsigned int block)
{
/* Issue the Sector Erase command */
*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
myusec_delay(10);
*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
myusec_delay(10);
*(volatile uint8_t *)(bios + 0x5555) = 0x80;
myusec_delay(10);
*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
myusec_delay(10);
*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
myusec_delay(10);
*(volatile uint8_t *)(bios + block) = 0x50;
myusec_delay(10);
/* wait for Toggle bit ready */
toggle_ready_jedec(bios);
return (0);
}
int erase_chip_jedec(struct flashchip *flash)
{
volatile uint8_t *bios = flash->virtual_memory;
/* Issue the JEDEC Chip Erase command */
*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
myusec_delay(10);
*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
myusec_delay(10);
*(volatile uint8_t *)(bios + 0x5555) = 0x80;
myusec_delay(10);
*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
myusec_delay(10);
*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
myusec_delay(10);
*(volatile uint8_t *)(bios + 0x5555) = 0x10;
myusec_delay(10);
toggle_ready_jedec(bios);
return (0);
}
int write_page_write_jedec(volatile uint8_t *bios, uint8_t *src,
volatile uint8_t *dst, int page_size)
{
int i, tried = 0, start_index = 0, ok;
volatile uint8_t *d = dst;
uint8_t *s = src;
retry:
/* Issue JEDEC Data Unprotect comand */
*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
*(volatile uint8_t *)(bios + 0x5555) = 0xA0;
/* transfer data from source to destination */
for (i = start_index; i < page_size; i++) {
/* If the data is 0xFF, don't program it */
if (*src != 0xFF)
*dst = *src;
dst++;
src++;
}
toggle_ready_jedec(dst - 1);
dst = d;
src = s;
ok = 1;
for (i = 0; i < page_size; i++) {
if (*dst != *src) {
ok = 0;
break;
}
dst++;
src++;
}
if (!ok && tried++ < MAX_REFLASH_TRIES) {
start_index = i;
goto retry;
}
if (!ok) {
fprintf(stderr, " page %d failed!\n",
(unsigned int)(d - bios) / page_size);
}
return (!ok);
}
int write_byte_program_jedec(volatile uint8_t *bios, uint8_t *src,
volatile uint8_t *dst)
{
int tried = 0, ok = 1;
/* If the data is 0xFF, don't program it */
if (*src == 0xFF) {
return -1;
}
retry:
/* Issue JEDEC Byte Program command */
*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
*(volatile uint8_t *)(bios + 0x5555) = 0xA0;
/* transfer data from source to destination */
*dst = *src;
toggle_ready_jedec(bios);
if (*dst != *src && tried++ < MAX_REFLASH_TRIES) {
goto retry;
}
if (tried >= MAX_REFLASH_TRIES)
ok = 0;
return (!ok);
}
int write_sector_jedec(volatile uint8_t *bios, uint8_t *src,
volatile uint8_t *dst, unsigned int page_size)
{
int i;
for (i = 0; i < page_size; i++) {
write_byte_program_jedec(bios, src, dst);
dst++, src++;
}
return (0);
}
int write_jedec(struct flashchip *flash, uint8_t *buf)
{
int i;
int total_size = flash->total_size * 1024;
int page_size = flash->page_size;
volatile uint8_t *bios = flash->virtual_memory;
erase_chip_jedec(flash);
// dumb check if erase was successful.
for (i = 0; i < total_size; i++) {
if (bios[i] != (uint8_t) 0xff) {
printf("ERASE FAILED\n");
return -1;
}
}
printf("Programming Page: ");
for (i = 0; i < total_size / page_size; i++) {
printf("%04d at address: 0x%08x", i, i * page_size);
write_page_write_jedec(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");
}
printf("\n");
protect_jedec(bios);
return (0);
}
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