mirror of
https://review.coreboot.org/flashrom.git
synced 2025-04-27 15:12:36 +02:00
5820f42ef2
Use chipaddr instead of volatile uint8_t * because when we access chips
in external flashers, they are not accessed via pointers at all.
Benefits: This allows us to differentiate between volatile machine
memory accesses and flash chip accesses. It also enforces usage
of chip_{read,write}[bwl] to access flash chips, so nobody will
unintentionally use pointers to access chips anymore. Some unneeded
casts are removed as well. Grepping for chip operations and machine
memory operations doesn't yield any false positives anymore.
Compile tested on 32 bit and 64 bit Linux.
Corresponding to flashrom svn r519.
Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>
161 lines
3.8 KiB
C
161 lines
3.8 KiB
C
/*
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* This file is part of the flashrom project.
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*
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* Copyright (C) 2000 Silicon Integrated System Corporation
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* Copyright (C) 2005 coresystems GmbH <stepan@openbios.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include "flash.h"
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#define AUTO_PG_ERASE1 0x20
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#define AUTO_PG_ERASE2 0xD0
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#define AUTO_PGRM 0x10
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#define CHIP_ERASE 0x30
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#define RESET 0xFF
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#define READ_ID 0x90
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static __inline__ void protect_28sf040(chipaddr bios)
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{
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uint8_t tmp;
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tmp = chip_readb(bios + 0x1823);
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tmp = chip_readb(bios + 0x1820);
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tmp = chip_readb(bios + 0x1822);
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tmp = chip_readb(bios + 0x0418);
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tmp = chip_readb(bios + 0x041B);
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tmp = chip_readb(bios + 0x0419);
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tmp = chip_readb(bios + 0x040A);
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}
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static __inline__ void unprotect_28sf040(chipaddr bios)
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{
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uint8_t tmp;
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tmp = chip_readb(bios + 0x1823);
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tmp = chip_readb(bios + 0x1820);
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tmp = chip_readb(bios + 0x1822);
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tmp = chip_readb(bios + 0x0418);
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tmp = chip_readb(bios + 0x041B);
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tmp = chip_readb(bios + 0x0419);
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tmp = chip_readb(bios + 0x041A);
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}
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static __inline__ int erase_sector_28sf040(chipaddr bios,
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unsigned long address)
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{
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chip_writeb(AUTO_PG_ERASE1, bios);
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chip_writeb(AUTO_PG_ERASE2, bios + address);
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/* wait for Toggle bit ready */
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toggle_ready_jedec(bios);
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return 0;
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}
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static __inline__ int write_sector_28sf040(chipaddr bios,
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uint8_t *src,
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chipaddr dst,
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unsigned int page_size)
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{
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int i;
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for (i = 0; i < page_size; i++) {
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/* transfer data from source to destination */
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if (*src == 0xFF) {
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dst++, src++;
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/* If the data is 0xFF, don't program it */
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continue;
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}
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/*issue AUTO PROGRAM command */
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chip_writeb(AUTO_PGRM, dst);
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chip_writeb(*src++, dst++);
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/* wait for Toggle bit ready */
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toggle_ready_jedec(bios);
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}
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return 0;
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}
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int probe_28sf040(struct flashchip *flash)
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{
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chipaddr bios = flash->virtual_memory;
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uint8_t id1, id2;
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chip_writeb(RESET, bios);
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myusec_delay(10);
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chip_writeb(READ_ID, bios);
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myusec_delay(10);
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id1 = chip_readb(bios);
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myusec_delay(10);
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id2 = chip_readb(bios + 0x01);
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chip_writeb(RESET, bios);
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myusec_delay(10);
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printf_debug("%s: id1 0x%02x, id2 0x%02x\n", __FUNCTION__, id1, id2);
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if (id1 == flash->manufacture_id && id2 == flash->model_id)
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return 1;
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return 0;
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}
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int erase_28sf040(struct flashchip *flash)
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{
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chipaddr bios = flash->virtual_memory;
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unprotect_28sf040(bios);
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chip_writeb(CHIP_ERASE, bios);
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chip_writeb(CHIP_ERASE, bios);
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protect_28sf040(bios);
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myusec_delay(10);
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toggle_ready_jedec(bios);
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return 0;
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}
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int write_28sf040(struct flashchip *flash, uint8_t *buf)
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{
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int i;
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int total_size = flash->total_size * 1024;
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int page_size = flash->page_size;
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chipaddr bios = flash->virtual_memory;
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unprotect_28sf040(bios);
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printf("Programming page: ");
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for (i = 0; i < total_size / page_size; i++) {
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/* erase the page before programming */
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erase_sector_28sf040(bios, i * page_size);
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/* write to the sector */
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printf("%04d at address: 0x%08x", i, i * page_size);
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write_sector_28sf040(bios, buf + i * page_size,
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bios + i * page_size, page_size);
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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");
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}
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printf("\n");
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protect_28sf040(bios);
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return 0;
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}
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