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authorStefan Reinauer <stepan@openbios.org>2005-11-24 10:45:34 +0000
committerStefan Reinauer <stepan@openbios.org>2005-11-24 10:45:34 +0000
commit7d5c7a7f1794cf846f2b62813c81f0f2a0ac5b54 (patch)
tree3ea89e5f20c249f3c0c8f31408577d3141214d3a /util/flashrom/sst39sf020.c
parente0e137844adc8366de58514b10ed962da46ce77b (diff)
rename the directory to match the program name
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2102 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'util/flashrom/sst39sf020.c')
-rw-r--r--util/flashrom/sst39sf020.c71
1 files changed, 71 insertions, 0 deletions
diff --git a/util/flashrom/sst39sf020.c b/util/flashrom/sst39sf020.c
new file mode 100644
index 0000000000..97e87a1c56
--- /dev/null
+++ b/util/flashrom/sst39sf020.c
@@ -0,0 +1,71 @@
+/*
+ * sst39sf020.c: driver for SST28SF040C flash models.
+ *
+ *
+ * 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:
+ * 4 MEgabit (512K x 8) SuperFlash EEPROM, SST28SF040 data sheet
+ *
+ * ToDo: Consilidated to standard JEDEC code.
+ *
+ * $Id$
+ */
+
+#include <stdio.h>
+#include "flash.h"
+#include "jedec.h"
+#include "sst39sf020.h"
+
+#define AUTO_PG_ERASE1 0x20
+#define AUTO_PG_ERASE2 0xD0
+
+static __inline__ int erase_sector_39sf020(volatile char *bios,
+ unsigned long address)
+{
+ *bios = AUTO_PG_ERASE1;
+ *(bios + address) = AUTO_PG_ERASE2;
+
+ /* wait for Toggle bit ready */
+ toggle_ready_jedec(bios);
+
+ return (0);
+}
+
+int write_39sf020(struct flashchip *flash, unsigned char *buf)
+{
+ int i;
+ int total_size = flash->total_size * 1024, page_size =
+ flash->page_size;
+ volatile char *bios = flash->virt_addr;
+
+ erase_chip_jedec(flash);
+
+ printf("Programming Page: ");
+ for (i = 0; i < total_size / page_size; i++) {
+ /* write to the sector */
+ 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");
+ fflush(stdout);
+ }
+ printf("\n");
+
+ return (0);
+}