From 4784c47a882247c107ba2e1c3c63e71b7d78e844 Mon Sep 17 00:00:00 2001 From: Nikolay Petukhov Date: Sat, 17 May 2008 01:08:58 +0000 Subject: Support Pm49FL004/2 Block Locking Registers 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 Signed-off-by: Peter Stuge Acked-by: Bari Ari --- pm49fl00x.c | 114 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 114 insertions(+) create mode 100644 pm49fl00x.c (limited to 'pm49fl00x.c') diff --git a/pm49fl00x.c b/pm49fl00x.c new file mode 100644 index 0000000..ed2fed0 --- /dev/null +++ b/pm49fl00x.c @@ -0,0 +1,114 @@ +/* + * This file is part of the flashrom project. + * + * Copyright (C) 2004 Tyan Corporation + * Copyright (C) 2007 Nikolay Petukhov + * Copyright (C) 2007 Reinder E.N. de Haan + * + * 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 +#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; +} -- cgit v1.1