Winbond W39V040C and MSI K8T Neo2-F

W39V040C does standard JEDEC commands except chip erase so add a small driver.
probe_w39v040c() prints the block lock pin status when a chip is found.

The Neo2 board enable matches on 8237-internal IDE and onboard NIC PCI IDs.

Many thanks to Daniel McLellan for testing all of this on hardware!
Build tested by Uwe.

Corresponding to flashrom svn r304 and coreboot v2 svn r3431.

Signed-off-by: Peter Stuge <peter@stuge.se>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>

1 files changed, 98 insertions, 0 deletions

diff --git a/w39v040c.c b/w39v040c.c
new file mode 100644
index 0000000..ce02596
--- /dev/null
+++ b/w39v040c.c
@@ -0,0 +1,98 @@
+/*
+ * This file is part of the flashrom project.
+ *
+ * Copyright (C) 2008 Peter Stuge <peter@stuge.se>
+ *
+ * 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 <stdio.h>
+#include "flash.h"
+
+int probe_w39v040c(struct flashchip *flash)
+{
+	volatile uint8_t *bios = flash->virtual_memory;
+	uint8_t id1, id2, lock;
+
+	*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
+	myusec_delay(10);
+	*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
+	myusec_delay(10);
+	*(volatile uint8_t *)(bios + 0x5555) = 0x90;
+	myusec_delay(10);
+
+	id1 = *(volatile uint8_t *)bios;
+	id2 = *(volatile uint8_t *)(bios + 1);
+	lock = *(volatile uint8_t *)(bios + 0xfff2);
+
+	*(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(40);
+
+	printf_debug("%s: id1 0x%x, id2 0x%x", __func__, id1, id2);
+	if (!oddparity(id1))
+		printf_debug(", id1 parity violation");
+	printf_debug("\n");
+	if (flash->manufacture_id == id1 && flash->model_id == id2) {
+		printf("%s: Boot block #TBL is %slocked, rest of chip #WP is %slocked.\n",
+			__func__, lock & 0x4 ? "" : "un", lock & 0x8 ? "" : "un");
+		return 1;
+	}
+
+	return 0;
+}
+
+int erase_w39v040c(struct flashchip *flash)
+{
+	int i;
+	unsigned int total_size = flash->total_size * 1024;
+	volatile uint8_t *bios = flash->virtual_memory;
+
+	for (i = 0; i < total_size; i += flash->page_size)
+		erase_sector_jedec(flash->virtual_memory, i);
+
+	for (i = 0; i < total_size; i++)
+		if (0xff != bios[i]) {
+			printf("ERASE FAILED at 0x%08x!  Expected=0xff, Read=0x%02x\n", i, bios[i]);
+			return -1;
+		}
+
+	return 0;
+}
+
+int write_w39v040c(struct flashchip *flash, uint8_t *buf)
+{
+	int i;
+	int total_size = flash->total_size * 1024;
+	int page_size = flash->page_size;
+	volatile uint8_t *bios = flash->virtual_memory;
+
+	if (flash->erase(flash))
+		return -1;
+
+	printf("Programming page: ");
+	for (i = 0; i < total_size / page_size; i++) {
+		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");
+	}
+	printf("\n");
+
+	return 0;
+}