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Support Pm49FL004/2 Block Locking Registers

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The PMC chips understand both LPC and FWH flash commands. When in FWH mode
(MSR_DIVIL_BALL_OPT(0x51400015) = 0x00000f7d on 5536 boards) the Block
Locking Registers by default lock the flash chip for write and erase - in
addition to any chipset write protection.

This patch adds unlock operations before Pm49FL004/2 write and erase, and
it includes an svn mv pm49fl004.c pm49fl00x.c

Thanks go to Nikolay for this patch.

Corresponding to flashrom svn r243 and coreboot v2 svn r3332.

Signed-off-by: Nikolay Petukhov <nikolay.petukhov@gmail.com>
Signed-off-by: Peter Stuge <peter@stuge.se>
Acked-by: Bari Ari <bari@onelabs.com>
This commit is contained in:
Nikolay Petukhov
2008-05-17 01:08:58 +00:00
committed by Peter Stuge
parent fc52409252
commit 4784c47a88
5 changed files with 121 additions and 58 deletions
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114
pm49fl00x.c Normal file
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/*
* This file is part of the flashrom project.
*
* Copyright (C) 2004 Tyan Corporation
* Copyright (C) 2007 Nikolay Petukhov <nikolay.petukhov@gmail.com>
* Copyright (C) 2007 Reinder E.N. de Haan <lb_reha@mveas.com>
*
* 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"
extern int exclude_start_page, exclude_end_page;
void write_lockbits_49fl00x(volatile uint8_t *bios, int size,
unsigned char bits, int block_size)
{
int i, left = size;
for (i = 0; left >= block_size; i++, left -= block_size) {
/* pm49fl002 */
if (block_size == 16384 && i%2)
continue;
*(bios + (i * block_size) + 2) = bits;
}
}
int probe_49fl00x(struct flashchip *flash)
{
int ret = probe_jedec(flash);
if (ret == 1)
map_flash_registers(flash);
return ret;
}
int erase_49fl00x(struct flashchip *flash)
{
int i;
int total_size = flash->total_size * 1024;
int page_size = flash->page_size;
volatile uint8_t *bios = flash->virtual_memory;
/* unprotected */
write_lockbits_49fl00x(flash->virtual_registers, total_size, 0, page_size);
//erase_chip_jedec will not work ... datasheet says "Chip erase is available in A/A Mux Mode only"
printf("Erasing page: ");
for (i = 0; i < total_size / page_size; i++) {
if ((i >= exclude_start_page) && (i < exclude_end_page))
continue;
/* erase the page */
erase_block_jedec(bios, i * page_size);
printf("%04d at address: 0x%08x", i, i * 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");
fflush(stdout);
}
printf("\n");
/* protected */
write_lockbits_49fl00x(flash->virtual_registers, total_size, 1, page_size);
return 0;
}
int write_49fl00x(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;
/* unprotected */
write_lockbits_49fl00x(flash->virtual_registers, total_size, 0, page_size);
printf("Programming page: ");
for (i = 0; i < total_size / page_size; i++) {
if ((i >= exclude_start_page) && (i < exclude_end_page))
continue;
/* erase the page before programming */
erase_block_jedec(bios, i * page_size);
/* write to the sector */
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");
fflush(stdout);
}
printf("\n");
/* protected */
write_lockbits_49fl00x(flash->virtual_registers, total_size, 1, page_size);
return 0;
}