diff options
Diffstat (limited to 'util/flashrom/w39v040c.c')
| -rw-r--r-- | util/flashrom/w39v040c.c | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/util/flashrom/w39v040c.c b/util/flashrom/w39v040c.c new file mode 100644 index 0000000000..ce025969f7 --- /dev/null +++ b/util/flashrom/w39v040c.c @@ -0,0 +1,98 @@ +/* + * This file is part of the flashrom project. + * + * Copyright (C) 2008 Peter Stuge <peter@stuge.se> + * + * 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 + */ + +#include <stdio.h> +#include "flash.h" + +int probe_w39v040c(struct flashchip *flash) +{ + volatile uint8_t *bios = flash->virtual_memory; + uint8_t id1, id2, lock; + + *(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); + + id1 = *(volatile uint8_t *)bios; + id2 = *(volatile uint8_t *)(bios + 1); + lock = *(volatile uint8_t *)(bios + 0xfff2); + + *(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(40); + + printf_debug("%s: id1 0x%x, id2 0x%x", __func__, id1, id2); + if (!oddparity(id1)) + printf_debug(", id1 parity violation"); + printf_debug("\n"); + if (flash->manufacture_id == id1 && flash->model_id == id2) { + printf("%s: Boot block #TBL is %slocked, rest of chip #WP is %slocked.\n", + __func__, lock & 0x4 ? "" : "un", lock & 0x8 ? "" : "un"); + return 1; + } + + return 0; +} + +int erase_w39v040c(struct flashchip *flash) +{ + int i; + unsigned int total_size = flash->total_size * 1024; + volatile uint8_t *bios = flash->virtual_memory; + + for (i = 0; i < total_size; i += flash->page_size) + erase_sector_jedec(flash->virtual_memory, i); + + for (i = 0; i < total_size; i++) + if (0xff != bios[i]) { + printf("ERASE FAILED at 0x%08x! Expected=0xff, Read=0x%02x\n", i, bios[i]); + return -1; + } + + return 0; +} + +int write_w39v040c(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; + + if (flash->erase(flash)) + 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_sector_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"); + + return 0; +} |