/*
- * 82802ab.c: driver for programming JEDEC standard flash parts
+ * This file is part of the flashrom project.
*
+ * Copyright (C) 2000 Silicon Integrated System Corporation
*
- * Copyright 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 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., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- *
- * Reference: http://www.intel.com/design/chipsets/datashts/290658.htm
+ * 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 <string.h>
#include <stdint.h>
#include "flash.h"
-void toggle_ready_82802ab(volatile uint8_t *dst)
-{
- unsigned int i = 0;
- uint8_t tmp1, tmp2;
-
- tmp1 = *dst & 0x40;
-
- while (i++ < 0xFFFFFF) {
- tmp2 = *dst & 0x40;
- if (tmp1 == tmp2) {
- break;
- }
- tmp1 = tmp2;
- }
-}
-
-void data_polling_82802ab(volatile uint8_t *dst, uint8_t data)
-{
- unsigned int i = 0;
- uint8_t tmp;
-
- data &= 0x80;
-
- while (i++ < 0xFFFFFF) {
- tmp = *dst & 0x80;
- if (tmp == data) {
- break;
- }
- }
-}
-
-void protect_82802ab(volatile uint8_t *bios)
-{
- *(volatile uint8_t *)(bios + 0x5555) = 0xAA;
- *(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
- *(volatile uint8_t *)(bios + 0x5555) = 0xA0;
-
- usleep(200);
-}
-
// I need that Berkeley bit-map printer
void print_82802ab_status(uint8_t status)
{
myusec_delay(10);
- printf_debug("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, id1, id2);
+ printf_debug("%s: id1 0x%02x, id2 0x%02x\n", __FUNCTION__, id1, id2);
if (id1 != flash->manufacture_id || id2 != flash->model_id)
return 0;
uint8_t wait_82802ab(volatile uint8_t *bios)
{
-
uint8_t status;
uint8_t id1, id2;
*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
*(volatile uint8_t *)(bios + 0x5555) = 0xF0;
- return status;
+ 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;
+ int j;
uint8_t status;
// clear status register
// now let's see what the register is
status = wait_82802ab(flash->virtual_memory);
//print_82802ab_status(status);
+ for (j = 0; j < flash->page_size; j++) {
+ if (*(bios + j) != 0xFF) {
+ printf("BLOCK ERASE failed at 0x%x\n", offset);
+ return -1;
+ }
+ }
printf("DONE BLOCK 0x%x\n", offset);
- return (0);
+
+ return 0;
}
+
int erase_82802ab(struct flashchip *flash)
{
int i;
for (i = 0; i < total_size; i += flash->page_size)
erase_82802ab_block(flash, i);
printf("DONE ERASE\n");
- return (0);
+
+ return 0;
}
void write_page_82802ab(volatile uint8_t *bios, uint8_t *src,
*dst++ = *src++;
wait_82802ab(bios);
}
-
}
int write_82802ab(struct flashchip *flash, uint8_t *buf)
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: ");
+ printf("Programming page: \n");
for (i = 0; i < total_size / page_size; i++) {
+ 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("%04d at address: 0x%08x", i, i * page_size);
+
+ /* Auto Skip Blocks, which already contain the desired data
+ * Faster, because we only write, what has changed
+ * More secure, because blocks, which are excluded
+ * (with the exclude or layout feature)
+ * or not erased and rewritten; their data is retained also in
+ * sudden power off situations
+ */
+ if (!memcmp((void *)(buf + i * page_size),
+ (void *)(bios + i * page_size), page_size)) {
+ printf("SKIPPED\n");
+ continue;
+ }
+
+ /* erase block by block and write block by block; this is the most secure way */
+ erase_82802ab_block(flash, 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_82802ab(bios);
- return (0);
+ protect_jedec(bios);
+
+ return 0;
}
projects / coreboot.git / blobdiff