mirror of
https://review.coreboot.org/flashrom.git
synced 2025-04-27 15:12:36 +02:00
ad3cc55e13
Constify variables where possible. Initialize programmer-related variables explicitly in programmer_init to allow running programmer_init from a clean state after programmer_shutdown. Prohibit registering programmer shutdown functions before init or after shutdown. Kill some dead code. Rename global variables with namespace-polluting names. Use a previously unused locking helper function in sst49lfxxxc.c. This is needed for libflashrom. Effects on the binary size of flashrom are minimal (300 bytes shrinkage), but the data section shrinks by 4384 bytes, and that's a good thing if flashrom is operating in constrained envionments. Corresponding to flashrom svn r1068. Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net> Acked-by: Michael Karcher <flashrom@mkarcher.dialup.fu-berlin.de>
153 lines
3.8 KiB
C
153 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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* Copyright (C) 2009 Sean Nelson <audiohacked@gmail.com>
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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 "flash.h"
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#include "chipdrivers.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 void protect_28sf040(chipaddr bios)
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{
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chip_readb(bios + 0x1823);
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chip_readb(bios + 0x1820);
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chip_readb(bios + 0x1822);
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chip_readb(bios + 0x0418);
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chip_readb(bios + 0x041B);
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chip_readb(bios + 0x0419);
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chip_readb(bios + 0x040A);
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}
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static void unprotect_28sf040(chipaddr bios)
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{
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chip_readb(bios + 0x1823);
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chip_readb(bios + 0x1820);
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chip_readb(bios + 0x1822);
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chip_readb(bios + 0x0418);
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chip_readb(bios + 0x041B);
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chip_readb(bios + 0x0419);
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chip_readb(bios + 0x041A);
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}
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int erase_sector_28sf040(struct flashchip *flash, unsigned int address, unsigned int sector_size)
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{
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chipaddr bios = flash->virtual_memory;
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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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if (check_erased_range(flash, address, sector_size)) {
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msg_cerr("ERASE FAILED!\n");
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return -1;
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}
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return 0;
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}
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static int write_sector_28sf040(chipaddr bios, uint8_t *src, 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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static 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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programmer_delay(10);
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toggle_ready_jedec(bios);
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if (check_erased_range(flash, 0, flash->total_size * 1024)) {
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msg_cerr("ERASE FAILED!\n");
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return -1;
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}
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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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msg_cinfo("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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if (erase_sector_28sf040(flash, i * page_size, page_size)) {
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msg_cerr("ERASE FAILED!\n");
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return -1;
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}
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/* write to the sector */
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msg_cinfo("%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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msg_cinfo("\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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msg_cinfo("\n");
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protect_28sf040(bios);
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return 0;
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}
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int erase_chip_28sf040(struct flashchip *flash, unsigned int addr, unsigned int blocklen)
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{
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if ((addr != 0) || (blocklen != flash->total_size * 1024)) {
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msg_cerr("%s called with incorrect arguments\n",
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__func__);
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return -1;
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}
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return erase_28sf040(flash);
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}
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