| /* |
| * This file is part of the flashrom project. |
| * |
| * Copyright (C) 2008 Claus Gindhart <claus.gindhart@kontron.com> |
| * |
| * 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 |
| */ |
| |
| /* |
| * This module is designed for supporting the devices |
| * ST M50FLW040A (not yet tested) |
| * ST M50FLW040B (not yet tested) |
| * ST M50FLW080A |
| * ST M50FLW080B (not yet tested) |
| */ |
| |
| #include <string.h> |
| #include <stdlib.h> |
| #include "flash.h" |
| #include "flashchips.h" |
| |
| void protect_stm50flw0x0x(chipaddr bios) |
| { |
| chip_writeb(0xAA, bios + 0x5555); |
| chip_writeb(0x55, bios + 0x2AAA); |
| chip_writeb(0xA0, bios + 0x5555); |
| |
| programmer_delay(200); |
| } |
| |
| int probe_stm50flw0x0x(struct flashchip *flash) |
| { |
| int result = probe_jedec(flash); |
| |
| if (!result) |
| return result; |
| |
| map_flash_registers(flash); |
| |
| return 1; |
| } |
| |
| static void wait_stm50flw0x0x(chipaddr bios) |
| { |
| chip_writeb(0x70, bios); |
| if ((chip_readb(bios) & 0x80) == 0) { // it's busy |
| while ((chip_readb(bios) & 0x80) == 0) ; |
| } |
| |
| // put another command to get out of status register mode |
| |
| chip_writeb(0x90, bios); |
| programmer_delay(10); |
| |
| chip_readb(bios); // Read device ID (to make sure?) |
| |
| // this is needed to jam it out of "read id" mode |
| chip_writeb(0xAA, bios + 0x5555); |
| chip_writeb(0x55, bios + 0x2AAA); |
| chip_writeb(0xF0, bios + 0x5555); |
| } |
| |
| /* |
| * claus.gindhart@kontron.com |
| * The ST M50FLW080B and STM50FLW080B chips have to be unlocked, |
| * before you can erase them or write to them. |
| */ |
| int unlock_block_stm50flw0x0x(struct flashchip *flash, int offset) |
| { |
| chipaddr wrprotect = flash->virtual_registers + 2; |
| const uint8_t unlock_sector = 0x00; |
| int j; |
| |
| /* |
| * These chips have to be unlocked before you can erase them or write |
| * to them. The size of the locking sectors depends on the type |
| * of chip. |
| * |
| * Sometimes, the BIOS does this for you; so you propably |
| * don't need to worry about that. |
| */ |
| |
| /* Check, if it's is a top/bottom-block with 4k-sectors. */ |
| /* TODO: What about the other types? */ |
| if ((offset == 0) || |
| (offset == (flash->model_id == ST_M50FLW080A ? 0xE0000 : 0x10000)) |
| || (offset == 0xF0000)) { |
| |
| // unlock each 4k-sector |
| for (j = 0; j < 0x10000; j += 0x1000) { |
| printf_debug("unlocking at 0x%x\n", offset + j); |
| chip_writeb(unlock_sector, wrprotect + offset + j); |
| if (chip_readb(wrprotect + offset + j) != unlock_sector) { |
| printf("Cannot unlock sector @ 0x%x\n", |
| offset + j); |
| return -1; |
| } |
| } |
| } else { |
| printf_debug("unlocking at 0x%x\n", offset); |
| chip_writeb(unlock_sector, wrprotect + offset); |
| if (chip_readb(wrprotect + offset) != unlock_sector) { |
| printf("Cannot unlock sector @ 0x%x\n", offset); |
| return -1; |
| } |
| } |
| |
| return 0; |
| } |
| |
| int erase_block_stm50flw0x0x(struct flashchip *flash, int offset) |
| { |
| chipaddr bios = flash->virtual_memory + offset; |
| |
| // clear status register |
| chip_writeb(0x50, bios); |
| printf_debug("Erase at 0x%lx\n", bios); |
| // now start it |
| chip_writeb(0x20, bios); |
| chip_writeb(0xd0, bios); |
| programmer_delay(10); |
| |
| wait_stm50flw0x0x(flash->virtual_memory); |
| |
| if (check_erased_range(flash, offset, flash->page_size)) { |
| fprintf(stderr, "ERASE FAILED!\n"); |
| return -1; |
| } |
| printf("DONE BLOCK 0x%x\n", offset); |
| |
| return 0; |
| } |
| |
| int write_page_stm50flw0x0x(chipaddr bios, uint8_t *src, |
| chipaddr dst, int page_size) |
| { |
| int i, rc = 0; |
| chipaddr d = dst; |
| uint8_t *s = src; |
| |
| /* transfer data from source to destination */ |
| for (i = 0; i < page_size; i++) { |
| chip_writeb(0x40, dst); |
| chip_writeb(*src++, dst++); |
| wait_stm50flw0x0x(bios); |
| } |
| |
| /* claus.gindhart@kontron.com |
| * TODO |
| * I think, that verification is not required, but |
| * i leave it in anyway |
| */ |
| dst = d; |
| src = s; |
| for (i = 0; i < page_size; i++) { |
| if (chip_readb(dst) != *src) { |
| rc = -1; |
| break; |
| } |
| dst++; |
| src++; |
| } |
| |
| if (rc) { |
| fprintf(stderr, " page 0x%lx failed!\n", |
| (d - bios) / page_size); |
| } |
| |
| return rc; |
| } |
| |
| /* I simply erase block by block |
| * I Chip This is not the fastest way, but it works |
| */ |
| int erase_stm50flw0x0x(struct flashchip *flash) |
| { |
| int i; |
| int total_size = flash->total_size * 1024; |
| int page_size = flash->page_size; |
| chipaddr bios = flash->virtual_memory; |
| |
| printf("Erasing 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); |
| if (unlock_block_stm50flw0x0x(flash, i * page_size)) { |
| fprintf(stderr, "UNLOCK FAILED!\n"); |
| return -1; |
| } |
| if (erase_block_stm50flw0x0x(flash, i * page_size)) { |
| fprintf(stderr, "ERASE FAILED!\n"); |
| return -1; |
| } |
| } |
| printf("\n"); |
| protect_stm50flw0x0x(bios); |
| |
| return 0; |
| } |
| |
| int write_stm50flw0x0x(struct flashchip *flash, uint8_t * buf) |
| { |
| int i, rc = 0; |
| int total_size = flash->total_size * 1024; |
| int page_size = flash->page_size; |
| chipaddr bios = flash->virtual_memory; |
| uint8_t *tmpbuf = malloc(page_size); |
| |
| if (!tmpbuf) { |
| printf("Could not allocate memory!\n"); |
| exit(1); |
| } |
| printf("Programming page: \n"); |
| for (i = 0; (i < total_size / page_size) && (rc == 0); 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) |
| * are not erased and rewritten; data is retained also |
| * in sudden power off situations |
| */ |
| chip_readn(tmpbuf, bios + i * page_size, page_size); |
| if (!memcmp((void *)(buf + i * page_size), tmpbuf, page_size)) { |
| printf("SKIPPED\n"); |
| continue; |
| } |
| |
| rc = unlock_block_stm50flw0x0x(flash, i * page_size); |
| if (!rc) |
| rc = erase_block_stm50flw0x0x(flash, i * page_size); |
| if (!rc) |
| write_page_stm50flw0x0x(bios, buf + i * page_size, |
| bios + i * page_size, page_size); |
| } |
| printf("\n"); |
| protect_stm50flw0x0x(bios); |
| free(tmpbuf); |
| |
| return rc; |
| } |