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authorCarl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>2008-03-14 00:02:25 +0000
committerCarl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>2008-03-14 00:02:25 +0000
commite7bcb19bf564808974d8f944acfbe30818a2bae1 (patch)
tree19c34c5b97df18769e286387fa4660c27c3afc10 /82802ab.c
parenteac10164378a08666ae4a8ce7279a1afc9962026 (diff)
downloadast2050-flashrom-e7bcb19bf564808974d8f944acfbe30818a2bae1.zip
ast2050-flashrom-e7bcb19bf564808974d8f944acfbe30818a2bae1.tar.gz
Revert the delete of 82802ab.c in r3137
Corresponding to flashrom svn r204 and coreboot v2 svn r3140. Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net> Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Diffstat (limited to '82802ab.c')
-rw-r--r--82802ab.c186
1 files changed, 186 insertions, 0 deletions
diff --git a/82802ab.c b/82802ab.c
new file mode 100644
index 0000000..38a5ce2
--- /dev/null
+++ b/82802ab.c
@@ -0,0 +1,186 @@
+/*
+ * This file is part of the flashrom project.
+ *
+ * Copyright (C) 2000 Silicon Integrated System Corporation
+ *
+ * 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
+ */
+
+/*
+ * Datasheet:
+ * - Name: Intel 82802AB/82802AC Firmware Hub (FWH)
+ * - URL: http://www.intel.com/design/chipsets/datashts/290658.htm
+ * - PDF: http://download.intel.com/design/chipsets/datashts/29065804.pdf
+ * - Order number: 290658-004
+ */
+
+#include <stdio.h>
+#include <stdint.h>
+#include "flash.h"
+
+// I need that Berkeley bit-map printer
+void print_82802ab_status(uint8_t status)
+{
+ printf("%s", status & 0x80 ? "Ready:" : "Busy:");
+ printf("%s", status & 0x40 ? "BE SUSPEND:" : "BE RUN/FINISH:");
+ printf("%s", status & 0x20 ? "BE ERROR:" : "BE OK:");
+ printf("%s", status & 0x10 ? "PROG ERR:" : "PROG OK:");
+ printf("%s", status & 0x8 ? "VP ERR:" : "VPP OK:");
+ printf("%s", status & 0x4 ? "PROG SUSPEND:" : "PROG RUN/FINISH:");
+ printf("%s", status & 0x2 ? "WP|TBL#|WP#,ABORT:" : "UNLOCK:");
+}
+
+int probe_82802ab(struct flashchip *flash)
+{
+ volatile uint8_t *bios = flash->virtual_memory;
+ uint8_t id1, id2;
+
+#if 0
+ *(volatile uint8_t *)(bios + 0x5555) = 0xAA;
+ *(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
+ *(volatile uint8_t *)(bios + 0x5555) = 0x90;
+#endif
+
+ *bios = 0xff;
+ myusec_delay(10);
+ *bios = 0x90;
+ myusec_delay(10);
+
+ id1 = *(volatile uint8_t *)bios;
+ id2 = *(volatile uint8_t *)(bios + 0x01);
+
+ /* Leave ID mode */
+ *(volatile uint8_t *)(bios + 0x5555) = 0xAA;
+ *(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
+ *(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 0;
+
+ map_flash_registers(flash);
+
+ return 1;
+}
+
+uint8_t wait_82802ab(volatile uint8_t *bios)
+{
+ uint8_t status;
+ uint8_t id1, id2;
+
+ *bios = 0x70;
+ if ((*bios & 0x80) == 0) { // it's busy
+ while ((*bios & 0x80) == 0) ;
+ }
+
+ status = *bios;
+
+ // put another command to get out of status register mode
+
+ *bios = 0x90;
+ myusec_delay(10);
+
+ id1 = *(volatile uint8_t *)bios;
+ id2 = *(volatile uint8_t *)(bios + 0x01);
+
+ // this is needed to jam it out of "read id" mode
+ *(volatile uint8_t *)(bios + 0x5555) = 0xAA;
+ *(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
+ *(volatile uint8_t *)(bios + 0x5555) = 0xF0;
+
+ return status;
+}
+
+int erase_82802ab_block(struct flashchip *flash, int offset)
+{
+ volatile uint8_t *bios = flash->virtual_memory + offset;
+ volatile uint8_t *wrprotect = flash->virtual_registers + offset + 2;
+ uint8_t status;
+
+ // clear status register
+ *bios = 0x50;
+ //printf("Erase at %p\n", bios);
+ // clear write protect
+ //printf("write protect is at %p\n", (wrprotect));
+ //printf("write protect is 0x%x\n", *(wrprotect));
+ *(wrprotect) = 0;
+ //printf("write protect is 0x%x\n", *(wrprotect));
+
+ // now start it
+ *(volatile uint8_t *)(bios) = 0x20;
+ *(volatile uint8_t *)(bios) = 0xd0;
+ myusec_delay(10);
+ // now let's see what the register is
+ status = wait_82802ab(flash->virtual_memory);
+ //print_82802ab_status(status);
+ printf("DONE BLOCK 0x%x\n", offset);
+
+ return 0;
+}
+
+int erase_82802ab(struct flashchip *flash)
+{
+ int i;
+ unsigned int total_size = flash->total_size * 1024;
+
+ printf("total_size is %d; flash->page_size is %d\n",
+ total_size, flash->page_size);
+ for (i = 0; i < total_size; i += flash->page_size)
+ erase_82802ab_block(flash, i);
+ printf("DONE ERASE\n");
+
+ return 0;
+}
+
+void write_page_82802ab(volatile uint8_t *bios, uint8_t *src,
+ volatile uint8_t *dst, int page_size)
+{
+ int i;
+
+ for (i = 0; i < page_size; i++) {
+ /* transfer data from source to destination */
+ *dst = 0x40;
+ *dst++ = *src++;
+ wait_82802ab(bios);
+ }
+}
+
+int write_82802ab(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;
+
+ erase_82802ab(flash);
+ if (*bios != 0xff) {
+ printf("ERASE FAILED\n");
+ 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_page_82802ab(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");
+ protect_jedec(bios);
+
+ return 0;
+}
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