Driver for ST M29F002T/NT/B

T/NT TEST_OK_ PROBE READ ERASE WRITE Test report from Julia. Thanks!

Corresponding to flashrom svn r409 and coreboot v2 svn r3917.

Signed-off-by: Peter Stuge <peter@stuge.se>
Acked-by: Julia Longtin <juri@solarnetone.org>

1 files changed, 105 insertions, 0 deletions

diff --git a/m29f002.c b/m29f002.c
new file mode 100644
index 0000000..a836587
--- /dev/null
+++ b/m29f002.c
@@ -0,0 +1,105 @@
+/*
+ * This file is part of flashrom.
+ *
+ * Copyright (C) 2009 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 "flash.h"
+
+int erase_m29f002(struct flashchip *flash) {
+	volatile uint8_t *bios = flash->virtual_memory;
+	*(volatile uint8_t *)(bios + 0x555) = 0xaa;
+	*(volatile uint8_t *)(bios + 0xaaa) = 0x55;
+	*(volatile uint8_t *)(bios + 0x555) = 0x80;
+	*(volatile uint8_t *)(bios + 0x555) = 0xaa;
+	*(volatile uint8_t *)(bios + 0xaaa) = 0x55;
+	*(volatile uint8_t *)(bios + 0x555) = 0x10;
+	myusec_delay(10);
+	toggle_ready_jedec(bios);
+	return 0;
+}
+
+static void rewrite_block(volatile uint8_t *bios, uint8_t *src, volatile uint8_t *dst, int size) {
+	/* erase */
+	*(volatile uint8_t *)(bios + 0x555) = 0xaa;
+	*(volatile uint8_t *)(bios + 0xaaa) = 0x55;
+	*(volatile uint8_t *)(bios + 0x555) = 0x80;
+	*(volatile uint8_t *)(bios + 0x555) = 0xaa;
+	*(volatile uint8_t *)(bios + 0xaaa) = 0x55;
+	*dst = 0x30;
+	myusec_delay(10);
+	toggle_ready_jedec(bios);
+
+	/* program */
+	while (size--) {
+		*(volatile uint8_t *)(bios + 0x555) = 0xaa;
+		*(volatile uint8_t *)(bios + 0xaaa) = 0x55;
+		*(volatile uint8_t *)(bios + 0x555) = 0xa0;
+		*dst = *src;
+		toggle_ready_jedec(dst);
+		dst++;
+		src++;
+	}
+}
+
+static void do_block(volatile uint8_t *bios, uint8_t *src, int i, unsigned long start, int size) {
+	printf("%d at address: 0x%08lx", i, start);
+	rewrite_block(bios, src + start, bios + start, 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");
+}
+
+int write_m29f002t(struct flashchip *flash, uint8_t *buf) {
+	int i, page_size = flash->page_size;
+	volatile uint8_t *bios = flash->virtual_memory;
+
+	/* M29F002(N)T has 7 blocks. From bottom to top their sizes are:
+	 * 64k 64k 64k 32k 8k 8k 16k
+	 * flash->page_size is set to 64k in flashchips.c
+	 */
+
+	printf("Programming block: ");
+	for (i = 0; i < 3; i++)
+		do_block(bios, buf, i, i*page_size, page_size);
+	do_block(bios, buf, i++, 0x30000, 32*1024);
+	do_block(bios, buf, i++, 0x38000, 8*1024);
+	do_block(bios, buf, i++, 0x3a000, 8*1024);
+	do_block(bios, buf, i++, 0x3c000, 16*1024);
+
+	printf("\n");
+	return 0;
+}
+
+int write_m29f002b(struct flashchip *flash, uint8_t *buf) {
+	int i = 0, page_size = flash->page_size;
+	volatile uint8_t *bios = flash->virtual_memory;
+
+	/* M29F002B has 7 blocks. From bottom to top their sizes are:
+	 * 16k 8k 8k 32k 64k 64k 64k
+	 * flash->page_size is set to 64k in flashchips.c
+	 */
+
+	printf("Programming block: ");
+	do_block(bios, buf, i++, 0x00000, 16*1024);
+	do_block(bios, buf, i++, 0x04000, 8*1024);
+	do_block(bios, buf, i++, 0x06000, 8*1024);
+	do_block(bios, buf, i++, 0x08000, 32*1024);
+	for (; i < 7; i++)
+		do_block(bios, buf, i, (i-3)*page_size, page_size);
+
+	printf("\n");
+	return 0;
+}