Add support for the Winbond W29EE011

Corresponding to flashrom svn r133 and coreboot v2 svn r2753.

Signed-off-by: Markus Boas <ryven@ryven.de>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>

1 files changed, 60 insertions, 0 deletions

diff --git a/w29ee011.c b/w29ee011.c
new file mode 100644
index 0000000..88a7a8a
--- /dev/null
+++ b/w29ee011.c
@@ -0,0 +1,60 @@
+/*
+ * This file is part of the flashrom project.
+ *
+ * Copyright (C) 2007 Markus Boas <ryven@ryven.de>
+ *
+ * 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ */
+
+#include "flash.h"
+
+int probe_w29ee011(struct flashchip *flash)
+{
+	volatile uint8_t *bios = flash->virtual_memory;
+	uint8_t id1, id2;
+
+	/* Issue JEDEC Product ID Entry command */
+	*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
+	myusec_delay(10);
+	*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
+	myusec_delay(10);
+	*(volatile uint8_t *)(bios + 0x5555) = 0x80;
+	myusec_delay(10);
+	*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
+	myusec_delay(10);
+	*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
+	myusec_delay(10);
+	*(volatile uint8_t *)(bios + 0x5555) = 0x60;
+	myusec_delay(10);
+
+	/* Read product ID */
+	id1 = *(volatile uint8_t *)bios;
+	id2 = *(volatile uint8_t *)(bios + 0x01);
+
+	/* Issue JEDEC Product ID Exit command */
+	*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
+	myusec_delay(10);
+	*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
+	myusec_delay(10);
+	*(volatile uint8_t *)(bios + 0x5555) = 0xF0;
+	myusec_delay(10);
+
+	printf_debug("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, id1, id2);
+
+	if (id1 == flash->manufacture_id && id2 == flash->model_id)
+		return 1;
+
+	return 0;
+}