From 5e5f75e559f605974afd3767bc650a1cc0ed6f1f Mon Sep 17 00:00:00 2001
From: "Ronald G. Minnich" <rminnich@gmail.com>
Date: Tue, 29 Jan 2002 18:21:41 +0000
Subject: Trying to make this general purpose user-land flash burner

Corresponding to coreboot v1 svn r489.
---
 jedec.h | 61 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 jedec.h

(limited to 'jedec.h')

diff --git a/jedec.h b/jedec.h
new file mode 100644
index 0000000..de9c3d6
--- /dev/null
+++ b/jedec.h
@@ -0,0 +1,61 @@
+extern int probe_jedec (struct flashchip * flash);
+extern int erase_jedec (struct flashchip * flash);
+extern int write_jedec (struct flashchip * flash, char * buf);
+
+extern __inline__ void toggle_ready_jedec (char * dst)
+{
+	unsigned int i = 0;
+	char tmp1, tmp2;
+
+	tmp1 = *dst & 0x40;
+
+	while (i++ < 0xFFFFFF) {
+		tmp2 = *dst & 0x40;
+		if (tmp1 == tmp2) {
+			break;
+		}
+		tmp1 = tmp2;
+	}
+}
+
+extern __inline__ void data_polling_jedec (char * dst, char data)
+{
+	unsigned int i = 0;
+	char tmp;
+
+	data &= 0x80;
+
+	while (i++ < 0xFFFFFF) {
+		tmp = *dst & 0x80;
+		if (tmp == data) {
+			break;
+		}
+	}
+}
+
+extern __inline__ void protect_jedec (char * bios)
+{
+	*(char *) (bios + 0x5555) = 0xAA;
+	*(char *) (bios + 0x2AAA) = 0x55;
+	*(char *) (bios + 0x5555) = 0xA0;
+
+	usleep(200);
+}
+
+extern __inline__ void write_page_jedec (char * bios, char * src, char * dst,
+					 int page_size)
+{
+	int i;
+
+	*(char *) (bios + 0x5555) = 0xAA;
+	*(char *) (bios + 0x2AAA) = 0x55;
+	*(char *) (bios + 0x5555) = 0xA0;
+
+	for (i = 0; i < page_size; i++) {
+		/* transfer data from source to destination */
+		*dst++ = *src++;
+	}
+
+	usleep(100);
+	toggle_ready_jedec(dst-1);
+}
-- 
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