From b193490201129c82ebd133e275b1d6846595fdfc Mon Sep 17 00:00:00 2001
From: "Ronald G. Minnich" <rminnich@gmail.com>
Date: Tue, 11 Jun 2002 19:15:55 +0000
Subject: Add support for ST M29F400BT - part 2

Corresponding to coreboot v1 svn r589.
---
 m29f400bt.h | 67 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100644 m29f400bt.h

(limited to 'm29f400bt.h')

diff --git a/m29f400bt.h b/m29f400bt.h
new file mode 100644
index 0000000..a645870
--- /dev/null
+++ b/m29f400bt.h
@@ -0,0 +1,67 @@
+extern int probe_m29f400bt (struct flashchip * flash);
+extern int erase_m29f400bt (struct flashchip * flash);
+extern int block_erase_m29f400bt (volatile char * bios, volatile char * dst);
+extern int write_m29f400bt (struct flashchip * flash, char * buf);
+extern int write_linuxbios_m29f400bt (struct flashchip * flash, char * buf);
+
+extern __inline__ void toggle_ready_m29f400bt (volatile 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_m29f400bt (volatile 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_m29f400bt (volatile char * bios)
+{
+	*(volatile char *) (bios + 0xAAA) = 0xAA;
+	*(volatile char *) (bios + 0x555) = 0x55;
+	*(volatile char *) (bios + 0xAAA) = 0xA0;
+
+	usleep(200);
+}
+
+extern __inline__ void write_page_m29f400bt (volatile char * bios, char * src, volatile char * dst,
+					 int page_size)
+{
+	int i;
+	
+	for (i = 0; i < page_size; i++) {
+		*(volatile char *) (bios + 0xAAA) = 0xAA;
+		*(volatile char *) (bios + 0x555) = 0x55;
+		*(volatile char *) (bios + 0xAAA) = 0xA0;
+
+		/* transfer data from source to destination */
+		*dst = *src;
+		//*(volatile char *) (bios) = 0xF0;
+		//usleep(5);
+		toggle_ready_m29f400bt(dst);
+		printf("Value in the flash at address %p = %#x, want %#x\n",dst-bios, *dst, *src);
+		dst++;
+		src++;
+	}
+
+}
-- 
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