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);
+}