[LinuxBIOS] [PATCH] flashrom: add support for EON EN29* chips

[Carl-Daniel Hailfinger]

This is just some preliminary code, not tested, not ready, but something
to look at. flashchips.c modifications still not done.

Signed-off-by: Carl-Daniel Hailfinger

Index: flash.h
===================================================================
--- flash.h	(Revision 3003)
+++ flash.h	(Arbeitskopie)
@@ -94,6 +94,13 @@
 #define EN_25B80		0x2014
 #define EN_25B16		0x2015
 #define EN_25B32		0x2016
+#define EN_29F512		0x21
+#define EN_29F010		0x20
+#define EN_29F040A		0x04
+#define EN_29LV010		0x6E
+#define EN_29LV040A		0x4F	/* EN_29LV040(A) */
+#define EN_29F002AT		0x92
+#define EN_29F002AB		0x97

#define FUJITSU_ID		0x04	/* Fujitsu */
 #define MBM29F400TC		0x23
Index: en29f002a.c
===================================================================
--- en29f002a.c	(Revision 0)
+++ en29f002a.c	(Revision 0)
@@ -0,0 +1,85 @@
+/*
+ * This file is part of the flashrom project.
+ *
+ * Copyright (C) 2007 Carl-Daniel Hailfinger
+ *
+ * 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
+ */
+
+/*
+   EN29F512 has 1C,21
+   EN29F010 has 1C,20
+   EN29F040A has 1C,04
+   EN29LV010 has 1C,6E and uses short F0 reset sequence
+   EN29LV040(A) has 1C,4F and uses short F0 reset sequence
+ */
+int probe_en29f512(struct flashchip *flash)
+{
+	volatile uint8_t *bios = flash->virtual_memory;
+	uint8_t id1, id2;
+
+	*(volatile uint8_t *)(bios + 0x555) = 0xAA;
+	*(volatile uint8_t *)(bios + 0x2AA) = 0x55;
+	*(volatile uint8_t *)(bios + 0x555) = 0x90;
+
+	myusec_delay(10);
+
+	id1 = *(volatile uint8_t *)(bios + 0x100);
+	id2 = *(volatile uint8_t *)(bios + 0x101);
+
+	/* exit by writing F0 anywhere? or the code below */
+	*(volatile uint8_t *)(bios + 0x555) = 0xAA;
+	*(volatile uint8_t *)(bios + 0x2AA) = 0x55;
+	*(volatile uint8_t *)(bios + 0x555) = 0xF0;
+
+	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;
+}
+
+/*
+   EN29F002AT has 1C,92
+   EN29F002AB has 1C,97
+ */
+int probe_en29f002a(struct flashchip *flash)
+{
+	volatile uint8_t *bios = flash->virtual_memory;
+	uint8_t id1, id2;
+
+	*(volatile uint8_t *)(bios + 0x555) = 0xAA;
+	*(volatile uint8_t *)(bios + 0xAAA) = 0x55;
+	*(volatile uint8_t *)(bios + 0x555) = 0x90;
+
+	myusec_delay(10);
+
+	id1 = *(volatile uint8_t *)(bios + 0x100);
+	id2 = *(volatile uint8_t *)(bios + 0x101);
+
+	/* exit by writing F0 anywhere? or the code below */
+	*(volatile uint8_t *)(bios + 0x555) = 0xAA;
+	*(volatile uint8_t *)(bios + 0xAAA) = 0x55;
+	*(volatile uint8_t *)(bios + 0x555) = 0xF0;
+
+	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;
+}
+