/* * 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 <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 *(volatile uint8_t *)(bios + 0x5555) = 0xAA; *(volatile uint8_t *)(bios + 0x2AAA) = 0x55; *(volatile uint8_t *)(bios + 0x5555) = 0x90; #endif *bios = 0xff; myusec_delay(10); *bios = 0x90; myusec_delay(10); id1 = *(volatile uint8_t *)bios; id2 = *(volatile uint8_t *)(bios + 0x01); /* Leave ID mode */ *(volatile uint8_t *)(bios + 0x5555) = 0xAA; *(volatile uint8_t *)(bios + 0x2AAA) = 0x55; *(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 0; map_flash_registers(flash); return 1; } uint8_t wait_82802ab(volatile uint8_t *bios) { uint8_t status; uint8_t id1, id2; *bios = 0x70; if ((*bios & 0x80) == 0) { // it's busy while ((*bios & 0x80) == 0) ; } status = *bios; // put another command to get out of status register mode *bios = 0x90; myusec_delay(10); id1 = *(volatile uint8_t *)bios; id2 = *(volatile uint8_t *)(bios + 0x01); // this is needed to jam it out of "read id" mode *(volatile uint8_t *)(bios + 0x5555) = 0xAA; *(volatile uint8_t *)(bios + 0x2AAA) = 0x55; *(volatile uint8_t *)(bios + 0x5555) = 0xF0; 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; uint8_t status; // clear status register *bios = 0x50; //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)); *(wrprotect) = 0; //printf("write protect is 0x%x\n", *(wrprotect)); // now start it *(volatile uint8_t *)(bios) = 0x20; *(volatile uint8_t *)(bios) = 0xd0; myusec_delay(10); // now let's see what the register is status = wait_82802ab(flash->virtual_memory); //print_82802ab_status(status); 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 */ *dst = 0x40; *dst++ = *src++; 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; erase_82802ab(flash); if (*bios != 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_82802ab(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; }