| /* |
| * This file is part of the flashrom project. |
| * |
| * Copyright (C) 2000 Silicon Integrated System Corporation |
| * Copyright (C) 2005 coresystems GmbH <stepan@openbios.org> |
| * Copyright (C) 2009 Sean Nelson <audiohacked@gmail.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 "flash.h" |
| #include "chipdrivers.h" |
| |
| #define AUTO_PG_ERASE1 0x20 |
| #define AUTO_PG_ERASE2 0xD0 |
| #define AUTO_PGRM 0x10 |
| #define CHIP_ERASE 0x30 |
| #define RESET 0xFF |
| #define READ_ID 0x90 |
| |
| int protect_28sf040(struct flashctx *flash) |
| { |
| chipaddr bios = flash->virtual_memory; |
| |
| chip_readb(flash, bios + 0x1823); |
| chip_readb(flash, bios + 0x1820); |
| chip_readb(flash, bios + 0x1822); |
| chip_readb(flash, bios + 0x0418); |
| chip_readb(flash, bios + 0x041B); |
| chip_readb(flash, bios + 0x0419); |
| chip_readb(flash, bios + 0x040A); |
| |
| return 0; |
| } |
| |
| int unprotect_28sf040(struct flashctx *flash) |
| { |
| chipaddr bios = flash->virtual_memory; |
| |
| chip_readb(flash, bios + 0x1823); |
| chip_readb(flash, bios + 0x1820); |
| chip_readb(flash, bios + 0x1822); |
| chip_readb(flash, bios + 0x0418); |
| chip_readb(flash, bios + 0x041B); |
| chip_readb(flash, bios + 0x0419); |
| chip_readb(flash, bios + 0x041A); |
| |
| return 0; |
| } |
| |
| int erase_sector_28sf040(struct flashctx *flash, unsigned int address, |
| unsigned int sector_size) |
| { |
| chipaddr bios = flash->virtual_memory; |
| |
| /* This command sequence is very similar to erase_block_82802ab. */ |
| chip_writeb(flash, AUTO_PG_ERASE1, bios); |
| chip_writeb(flash, AUTO_PG_ERASE2, bios + address); |
| |
| /* wait for Toggle bit ready */ |
| toggle_ready_jedec(flash, bios); |
| |
| /* FIXME: Check the status register for errors. */ |
| return 0; |
| } |
| |
| /* chunksize is 1 */ |
| int write_28sf040(struct flashctx *flash, uint8_t *src, unsigned int start, |
| unsigned int len) |
| { |
| int i; |
| chipaddr bios = flash->virtual_memory; |
| chipaddr dst = flash->virtual_memory + start; |
| |
| for (i = 0; i < len; i++) { |
| /* transfer data from source to destination */ |
| if (*src == 0xFF) { |
| dst++, src++; |
| /* If the data is 0xFF, don't program it */ |
| continue; |
| } |
| /*issue AUTO PROGRAM command */ |
| chip_writeb(flash, AUTO_PGRM, dst); |
| chip_writeb(flash, *src++, dst++); |
| |
| /* wait for Toggle bit ready */ |
| toggle_ready_jedec(flash, bios); |
| } |
| |
| return 0; |
| } |
| |
| static int erase_28sf040(struct flashctx *flash) |
| { |
| chipaddr bios = flash->virtual_memory; |
| |
| chip_writeb(flash, CHIP_ERASE, bios); |
| chip_writeb(flash, CHIP_ERASE, bios); |
| |
| programmer_delay(10); |
| toggle_ready_jedec(flash, bios); |
| |
| /* FIXME: Check the status register for errors. */ |
| return 0; |
| } |
| |
| int erase_chip_28sf040(struct flashctx *flash, unsigned int addr, |
| unsigned int blocklen) |
| { |
| if ((addr != 0) || (blocklen != flash->chip->total_size * 1024)) { |
| msg_cerr("%s called with incorrect arguments\n", |
| __func__); |
| return -1; |
| } |
| return erase_28sf040(flash); |
| } |