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-rw-r--r--w39v040c.c98
1 files changed, 98 insertions, 0 deletions
diff --git a/w39v040c.c b/w39v040c.c
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+++ b/w39v040c.c
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+/*
+ * 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;
+}
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