diff options
Diffstat (limited to 'm29f002.c')
| -rw-r--r-- | m29f002.c | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/m29f002.c b/m29f002.c new file mode 100644 index 0000000..a836587 --- /dev/null +++ b/m29f002.c @@ -0,0 +1,105 @@ +/* + * This file is part of flashrom. + * + * Copyright (C) 2009 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 "flash.h" + +int erase_m29f002(struct flashchip *flash) { + volatile uint8_t *bios = flash->virtual_memory; + *(volatile uint8_t *)(bios + 0x555) = 0xaa; + *(volatile uint8_t *)(bios + 0xaaa) = 0x55; + *(volatile uint8_t *)(bios + 0x555) = 0x80; + *(volatile uint8_t *)(bios + 0x555) = 0xaa; + *(volatile uint8_t *)(bios + 0xaaa) = 0x55; + *(volatile uint8_t *)(bios + 0x555) = 0x10; + myusec_delay(10); + toggle_ready_jedec(bios); + return 0; +} + +static void rewrite_block(volatile uint8_t *bios, uint8_t *src, volatile uint8_t *dst, int size) { + /* erase */ + *(volatile uint8_t *)(bios + 0x555) = 0xaa; + *(volatile uint8_t *)(bios + 0xaaa) = 0x55; + *(volatile uint8_t *)(bios + 0x555) = 0x80; + *(volatile uint8_t *)(bios + 0x555) = 0xaa; + *(volatile uint8_t *)(bios + 0xaaa) = 0x55; + *dst = 0x30; + myusec_delay(10); + toggle_ready_jedec(bios); + + /* program */ + while (size--) { + *(volatile uint8_t *)(bios + 0x555) = 0xaa; + *(volatile uint8_t *)(bios + 0xaaa) = 0x55; + *(volatile uint8_t *)(bios + 0x555) = 0xa0; + *dst = *src; + toggle_ready_jedec(dst); + dst++; + src++; + } +} + +static void do_block(volatile uint8_t *bios, uint8_t *src, int i, unsigned long start, int size) { + printf("%d at address: 0x%08lx", i, start); + rewrite_block(bios, src + start, bios + start, 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"); +} + +int write_m29f002t(struct flashchip *flash, uint8_t *buf) { + int i, page_size = flash->page_size; + volatile uint8_t *bios = flash->virtual_memory; + + /* M29F002(N)T has 7 blocks. From bottom to top their sizes are: + * 64k 64k 64k 32k 8k 8k 16k + * flash->page_size is set to 64k in flashchips.c + */ + + printf("Programming block: "); + for (i = 0; i < 3; i++) + do_block(bios, buf, i, i*page_size, page_size); + do_block(bios, buf, i++, 0x30000, 32*1024); + do_block(bios, buf, i++, 0x38000, 8*1024); + do_block(bios, buf, i++, 0x3a000, 8*1024); + do_block(bios, buf, i++, 0x3c000, 16*1024); + + printf("\n"); + return 0; +} + +int write_m29f002b(struct flashchip *flash, uint8_t *buf) { + int i = 0, page_size = flash->page_size; + volatile uint8_t *bios = flash->virtual_memory; + + /* M29F002B has 7 blocks. From bottom to top their sizes are: + * 16k 8k 8k 32k 64k 64k 64k + * flash->page_size is set to 64k in flashchips.c + */ + + printf("Programming block: "); + do_block(bios, buf, i++, 0x00000, 16*1024); + do_block(bios, buf, i++, 0x04000, 8*1024); + do_block(bios, buf, i++, 0x06000, 8*1024); + do_block(bios, buf, i++, 0x08000, 32*1024); + for (; i < 7; i++) + do_block(bios, buf, i, (i-3)*page_size, page_size); + + printf("\n"); + return 0; +} |
