due to popular demand, added flash_and_burn to the freebios2 tree.

[coreboot.git] / util / flash_and_burn / jedec.c

diff --git a/util/flash_and_burn/jedec.c b/util/flash_and_burn/jedec.c
new file mode 100644 (file)
index 0000000..bb4a874
--- /dev/null
+++ b/util/flash_and_burn/jedec.c
@@ -0,0 +1,98 @@
+/*
+ * 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 <stdio.h>
+#include "flash.h"
+#include "jedec.h"
+
+int probe_jedec (struct flashchip * flash)
+{
+       volatile char * bios = flash->virt_addr;
+       unsigned char  id1, id2;
+
+       *(volatile char *) (bios + 0x5555) = 0xAA;
+       *(volatile char *) (bios + 0x2AAA) = 0x55;
+       *(volatile char *) (bios + 0x5555) = 0x90;
+
+       myusec_delay(10);
+
+       id1 = *(volatile unsigned char *) bios;
+       id2 = *(volatile unsigned char *) (bios + 0x01);
+
+       *(volatile char *) (bios + 0x5555) = 0xAA;
+       *(volatile char *) (bios + 0x2AAA) = 0x55;
+       *(volatile char *) (bios + 0x5555) = 0xF0;
+
+       myusec_delay(10);
+
+       printf("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, id1, id2);
+       if (id1 == flash->manufacture_id && id2 == flash->model_id)
+               return 1;
+
+       return 0;
+}
+
+int erase_jedec (struct flashchip * flash)
+{
+       volatile char * bios = flash->virt_addr;
+
+       *(volatile char *) (bios + 0x5555) = 0xAA;
+       *(volatile char *) (bios + 0x2AAA) = 0x55;
+       *(volatile char *) (bios + 0x5555) = 0x80;
+
+       *(volatile char *) (bios + 0x5555) = 0xAA;
+       *(volatile char *) (bios + 0x2AAA) = 0x55;
+       *(volatile char *) (bios + 0x5555) = 0x10;
+
+       myusec_delay(10);
+       toggle_ready_jedec(bios);
+
+       return(0);
+}
+
+int write_jedec (struct flashchip * flash, unsigned char * buf)
+{
+       int i;
+       int total_size = flash->total_size *1024, page_size = flash->page_size;
+       volatile unsigned char * bios = flash->virt_addr;
+
+       erase_jedec (flash);
+       if (*bios != (unsigned char ) 0xff) {
+               printf("ERASE FAILED\n");
+               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_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);
+
+       return(0);
+}