863c1bf525
Signed-off-by: Uwe Hermann <uwe@hermann-uwe.de> Acked-by: Uwe Hermann <uwe@hermann-uwe.de> git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2768 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
163 lines
4.1 KiB
C
163 lines
4.1 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(volatile uint8_t *bios)
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{
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/* ask compiler not to optimize this */
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volatile uint8_t tmp;
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tmp = *(volatile uint8_t *)(bios + 0x1823);
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tmp = *(volatile uint8_t *)(bios + 0x1820);
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tmp = *(volatile uint8_t *)(bios + 0x1822);
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tmp = *(volatile uint8_t *)(bios + 0x0418);
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tmp = *(volatile uint8_t *)(bios + 0x041B);
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tmp = *(volatile uint8_t *)(bios + 0x0419);
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tmp = *(volatile uint8_t *)(bios + 0x040A);
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}
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static __inline__ void unprotect_28sf040(volatile uint8_t *bios)
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{
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/* ask compiler not to optimize this */
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volatile uint8_t tmp;
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tmp = *(volatile uint8_t *)(bios + 0x1823);
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tmp = *(volatile uint8_t *)(bios + 0x1820);
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tmp = *(volatile uint8_t *)(bios + 0x1822);
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tmp = *(volatile uint8_t *)(bios + 0x0418);
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tmp = *(volatile uint8_t *)(bios + 0x041B);
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tmp = *(volatile uint8_t *)(bios + 0x0419);
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tmp = *(volatile uint8_t *)(bios + 0x041A);
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}
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static __inline__ int erase_sector_28sf040(volatile uint8_t *bios,
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unsigned long address)
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{
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*bios = AUTO_PG_ERASE1;
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*(bios + address) = AUTO_PG_ERASE2;
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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(volatile uint8_t *bios,
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uint8_t *src,
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volatile uint8_t *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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*dst = AUTO_PGRM;
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*dst++ = *src++;
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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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volatile uint8_t *bios = flash->virtual_memory;
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uint8_t id1, id2;
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*bios = RESET;
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myusec_delay(10);
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*bios = READ_ID;
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myusec_delay(10);
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id1 = *(volatile uint8_t *)bios;
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myusec_delay(10);
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id2 = *(volatile uint8_t *)(bios + 0x01);
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*bios = RESET;
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myusec_delay(10);
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printf_debug("%s: id1 0x%x, id2 0x%x\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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volatile uint8_t *bios = flash->virtual_memory;
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unprotect_28sf040(bios);
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*bios = CHIP_ERASE;
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*bios = CHIP_ERASE;
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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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volatile uint8_t *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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