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/*
* This file is part of the flashrom project.
*
* Copyright (C) 2000 Silicon Integrated System 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* Datasheet:
* - Name: Intel 82802AB/82802AC Firmware Hub (FWH)
* - URL: http://www.intel.com/design/chipsets/datashts/290658.htm
* - PDF: http://download.intel.com/design/chipsets/datashts/29065804.pdf
* - Order number: 290658-004
*/
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include "flash.h"
// I need that Berkeley bit-map printer
void print_82802ab_status(uint8_t status)
{
printf("%s", status & 0x80 ? "Ready:" : "Busy:");
printf("%s", status & 0x40 ? "BE SUSPEND:" : "BE RUN/FINISH:");
printf("%s", status & 0x20 ? "BE ERROR:" : "BE OK:");
printf("%s", status & 0x10 ? "PROG ERR:" : "PROG OK:");
printf("%s", status & 0x8 ? "VP ERR:" : "VPP OK:");
printf("%s", status & 0x4 ? "PROG SUSPEND:" : "PROG RUN/FINISH:");
printf("%s", status & 0x2 ? "WP|TBL#|WP#,ABORT:" : "UNLOCK:");
}
int probe_82802ab(struct flashchip *flash)
{
volatile uint8_t *bios = flash->virtual_memory;
uint8_t id1, id2;
#if 0
writeb(0xAA, bios + 0x5555);
writeb(0x55, bios + 0x2AAA);
writeb(0x90, bios + 0x5555);
#endif
writeb(0xff, bios);
myusec_delay(10);
writeb(0x90, bios);
myusec_delay(10);
id1 = readb(bios);
id2 = readb(bios + 0x01);
/* Leave ID mode */
writeb(0xAA, bios + 0x5555);
writeb(0x55, bios + 0x2AAA);
writeb(0xF0, bios + 0x5555);
myusec_delay(10);
printf_debug("%s: id1 0x%02x, id2 0x%02x\n", __FUNCTION__, id1, id2);
if (id1 != flash->manufacture_id || id2 != flash->model_id)
return 0;
map_flash_registers(flash);
return 1;
}
uint8_t wait_82802ab(volatile uint8_t *bios)
{
uint8_t status;
uint8_t id1, id2;
writeb(0x70, bios);
if ((readb(bios) & 0x80) == 0) { // it's busy
while ((readb(bios) & 0x80) == 0) ;
}
status = readb(bios);
// put another command to get out of status register mode
writeb(0x90, bios);
myusec_delay(10);
id1 = readb(bios);
id2 = readb(bios + 0x01);
// this is needed to jam it out of "read id" mode
writeb(0xAA, bios + 0x5555);
writeb(0x55, bios + 0x2AAA);
writeb(0xF0, bios + 0x5555);
return status;
}
int erase_82802ab_block(struct flashchip *flash, int offset)
{
volatile uint8_t *bios = flash->virtual_memory + offset;
volatile uint8_t *wrprotect = flash->virtual_registers + offset + 2;
int j;
uint8_t status;
// clear status register
writeb(0x50, bios);
//printf("Erase at %p\n", bios);
// clear write protect
//printf("write protect is at %p\n", (wrprotect));
//printf("write protect is 0x%x\n", *(wrprotect));
writeb(0, wrprotect);
//printf("write protect is 0x%x\n", *(wrprotect));
// now start it
writeb(0x20, bios);
writeb(0xd0, bios);
myusec_delay(10);
// now let's see what the register is
status = wait_82802ab(flash->virtual_memory);
//print_82802ab_status(status);
for (j = 0; j < flash->page_size; j++) {
if (readb(bios + j) != 0xFF) {
printf("BLOCK ERASE failed at 0x%x\n", offset);
return -1;
}
}
printf("DONE BLOCK 0x%x\n", offset);
return 0;
}
int erase_82802ab(struct flashchip *flash)
{
int i;
unsigned int total_size = flash->total_size * 1024;
printf("total_size is %d; flash->page_size is %d\n",
total_size, flash->page_size);
for (i = 0; i < total_size; i += flash->page_size)
erase_82802ab_block(flash, i);
printf("DONE ERASE\n");
return 0;
}
void write_page_82802ab(volatile uint8_t *bios, uint8_t *src,
volatile uint8_t *dst, int page_size)
{
int i;
for (i = 0; i < page_size; i++) {
/* transfer data from source to destination */
writeb(0x40, dst);
writeb(*src++, dst++);
wait_82802ab(bios);
}
}
int write_82802ab(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;
printf("Programming page: \n");
for (i = 0; i < total_size / page_size; i++) {
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("%04d at address: 0x%08x", i, i * page_size);
/* Auto Skip Blocks, which already contain the desired data
* Faster, because we only write, what has changed
* More secure, because blocks, which are excluded
* (with the exclude or layout feature)
* or not erased and rewritten; their data is retained also in
* sudden power off situations
*/
if (!memcmp((void *)(buf + i * page_size),
(void *)(bios + i * page_size), page_size)) {
printf("SKIPPED\n");
continue;
}
/* erase block by block and write block by block; this is the most secure way */
erase_82802ab_block(flash, i * page_size);
write_page_82802ab(bios, buf + i * page_size,
bios + i * page_size, page_size);
}
printf("\n");
protect_jedec(bios);
return 0;
}
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