diff options
Diffstat (limited to 'util/flashrom/w39v080fa.c')
| -rw-r--r-- | util/flashrom/w39v080fa.c | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/util/flashrom/w39v080fa.c b/util/flashrom/w39v080fa.c new file mode 100644 index 0000000000..8547fb3bc6 --- /dev/null +++ b/util/flashrom/w39v080fa.c @@ -0,0 +1,206 @@ +/* + * This file is part of the flashrom project. + * + * Copyright (C) 2008 coresystems GmbH + * + * 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_winbond_fwhub(struct flashchip *flash) +{ + volatile uint8_t *bios = flash->virtual_memory; + uint8_t vid, did; + + /* Product Identification Entry */ + *(volatile uint8_t *)(bios + 0x5555) = 0xAA; + *(volatile uint8_t *)(bios + 0x2AAA) = 0x55; + *(volatile uint8_t *)(bios + 0x5555) = 0x90; + myusec_delay(10); + + /* Read product ID */ + vid = *(volatile uint8_t *)bios; + did = *(volatile uint8_t *)(bios + 0x01); + + /* Product Identifixation Exit */ + *(volatile uint8_t *)(bios + 0x5555) = 0xAA; + *(volatile uint8_t *)(bios + 0x2AAA) = 0x55; + *(volatile uint8_t *)(bios + 0x5555) = 0xF0; + myusec_delay(10); + + printf_debug("%s: vid 0x%x, did 0x%x\n", __FUNCTION__, vid, did); + + if (vid != flash->manufacture_id || did != flash->model_id) + return 0; + + map_flash_registers(flash); + + return 1; +} + +static int unlock_block_winbond_fwhub(struct flashchip *flash, int offset) +{ + volatile uint8_t *wrprotect = flash->virtual_registers + offset + 2; + uint8_t locking; + + printf_debug("Trying to unlock block @0x%08x = 0x%02x\n", offset, *wrprotect); + + locking = *wrprotect; + switch (locking & 0x7 ) { + case 0: + printf_debug("Full Access.\n"); + return 0; + case 1: + printf_debug("Write Lock (Default State).\n"); + *wrprotect = 0; + return 0; + case 2: + printf_debug("Locked Open (Full Access, Lock Down).\n"); + return 0; + case 3: + fprintf(stderr, "Error: Write Lock, Locked Down.\n"); + return -1; + case 4: + printf_debug("Read Lock.\n"); + *wrprotect = 0; + return 0; + case 5: + printf_debug("Read/Write Lock.\n"); + *wrprotect = 0; + return 0; + case 6: + fprintf(stderr, "Error: Read Lock, Locked Down.\n"); + return -1; + case 7: + fprintf(stderr, "Error: Read/Write Lock, Locked Down.\n"); + return -1; + } + + /* We will never reach this point, but GCC doesn't know */ + return -1; +} + +int unlock_winbond_fwhub(struct flashchip *flash) +{ + int i, total_size = flash->total_size * 1024; + volatile uint8_t *bios = flash->virtual_memory; + uint8_t locking; + + /* Are there any hardware restrictions that we can't overcome? + * If flashrom fail here, someone's got to check all those GPIOs. + */ + + /* Product Identification Entry */ + *(volatile uint8_t *)(bios + 0x5555) = 0xAA; + *(volatile uint8_t *)(bios + 0x2AAA) = 0x55; + *(volatile uint8_t *)(bios + 0x5555) = 0x90; + myusec_delay(10); + + /* Read Hardware Lock Bits */ + locking = *(volatile uint8_t *)(bios + 0xffff2); + + /* Product Identification Exit */ + *(volatile uint8_t *)(bios + 0x5555) = 0xAA; + *(volatile uint8_t *)(bios + 0x2AAA) = 0x55; + *(volatile uint8_t *)(bios + 0x5555) = 0xF0; + myusec_delay(10); + + printf_debug("Lockout bits:\n"); + + if (locking & (1<<2)) + fprintf(stderr, "Error: hardware bootblock locking (#TBL).\n"); + else + printf_debug("No hardware bootblock locking (good!)\n"); + + if (locking & (1<<3)) + fprintf(stderr, "Error: hardware block locking (#WP).\n"); + else + printf_debug("No hardware block locking (good!)\n"); + + if (locking & ((1<<2) | (1<<3))) + return -1; + + /* Unlock the complete chip */ + for (i = 0; i < total_size; i += flash->page_size) + if (unlock_block_winbond_fwhub(flash, i)) + return -1; + + return 0; +} + +static int erase_sector_winbond_fwhub(volatile uint8_t *bios, unsigned int sector) +{ + /* Remember: too much sleep can waste your day. */ + + printf("0x%08x\b\b\b\b\b\b\b\b\b\b", sector); + + /* Sector Erase */ + *(volatile uint8_t *)(bios + 0x5555) = 0xAA; + *(volatile uint8_t *)(bios + 0x2AAA) = 0x55; + *(volatile uint8_t *)(bios + 0x5555) = 0x80; + + *(volatile uint8_t *)(bios + 0x5555) = 0xAA; + *(volatile uint8_t *)(bios + 0x2AAA) = 0x55; + *(volatile uint8_t *)(bios + sector) = 0x30; + + /* wait for Toggle bit ready */ + toggle_ready_jedec(bios); + + return 0; +} + +int erase_winbond_fwhub(struct flashchip *flash) +{ + int i, total_size = flash->total_size * 1024; + volatile uint8_t *bios = flash->virtual_memory; + + printf("Erasing: "); + + for (i = 0; i < total_size; i += flash->page_size) + erase_sector_winbond_fwhub(bios, i); + + printf("\n"); + + for (i = 0; i < total_size; i++) { + if (bios[i] != 0xff) { + fprintf(stderr, "Error: Flash chip erase failed at 0x%08x(0x%02x)\n", i, bios[i]); + return -1; + } + } + + return 0; +} + +int write_winbond_fwhub(struct flashchip *flash, uint8_t *buf) +{ + int i; + int total_size = flash->total_size * 1024; + volatile uint8_t *bios = flash->virtual_memory; + + if (erase_winbond_fwhub(flash)) + return -1; + + printf("Programming: "); + for (i = 0; i < total_size; i+=flash->page_size) { + printf("0x%08x\b\b\b\b\b\b\b\b\b\b", i); + write_sector_jedec(bios, buf + i, bios + i, flash->page_size); + } + printf("\n"); + + return 0; +} + |