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author | Ronald G. Minnich <rminnich@gmail.com> | 2002-01-29 18:21:41 +0000 |
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committer | Ronald G. Minnich <rminnich@gmail.com> | 2002-01-29 18:21:41 +0000 |
commit | 5e5f75e559f605974afd3767bc650a1cc0ed6f1f (patch) | |
tree | 6923dc3d9468a6929079951532dd9fa9040637eb /jedec.c | |
download | flashrom-5e5f75e559f605974afd3767bc650a1cc0ed6f1f.tar.gz flashrom-5e5f75e559f605974afd3767bc650a1cc0ed6f1f.tar.bz2 flashrom-5e5f75e559f605974afd3767bc650a1cc0ed6f1f.zip |
Trying to make this general purpose user-land flash burner
Corresponding to coreboot v1 svn r489.
Diffstat (limited to 'jedec.c')
-rw-r--r-- | jedec.c | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/jedec.c b/jedec.c new file mode 100644 index 000000000..73a399c43 --- /dev/null +++ b/jedec.c @@ -0,0 +1,88 @@ +/* + * jedec.c: driver for programming JEDEC standard flash parts + * + * + * Copyright 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., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * + * Reference: + * + * $Id$ + */ + +#include "flash.h" +#include "jedec.h" + +int probe_jedec (struct flashchip * flash) +{ + char * bios = flash->virt_addr; + unsigned char id1, id2; + + *(char *) (bios + 0x5555) = 0xAA; + *(char *) (bios + 0x2AAA) = 0x55; + *(char *) (bios + 0x5555) = 0x90; + + usleep(10); + + id1 = *(unsigned char *) bios; + id2 = *(unsigned char *) (bios + 0x01); + + *(char *) (bios + 0x5555) = 0xAA; + *(char *) (bios + 0x2AAA) = 0x55; + *(char *) (bios + 0x5555) = 0xF0; + + usleep(10); + + if (id1 == flash->manufacture_id && id2 == flash->model_id) + return 1; + + return 0; +} + +int erase_jedec (struct flashchip * flash) +{ + char * bios = flash->virt_addr; + + *(char *) (bios + 0x5555) = 0xAA; + *(char *) (bios + 0x2AAA) = 0x55; + *(char *) (bios + 0x5555) = 0x80; + + *(char *) (bios + 0x5555) = 0xAA; + *(char *) (bios + 0x2AAA) = 0x55; + *(char *) (bios + 0x5555) = 0x10; + + usleep(10); + toggle_ready_jedec(bios); +} + +int write_jedec (struct flashchip * flash, char * buf) +{ + int i; + int total_size = flash->total_size *1024, page_size = flash->page_size; + char * bios = flash->virt_addr; + + erase_jedec (flash); + printf ("Programming Page: "); + for (i = 0; i < total_size/page_size; i++) { + printf ("%04d at address: 0x%08x", i, i * page_size); + write_page_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"); + protect_jedec (bios); +} |