mirror of
https://review.coreboot.org/flashrom.git
synced 2025-04-26 22:52:34 +02:00
8a3c60cdd0
All programmer access function prototypes except init have been made static and moved to the respective file. A few internal functions in flash chip drivers had chipaddr parameters which are no longer needed. The lines touched by flashctx changes have been adjusted to 80 columns except in header files. Corresponding to flashrom svn r1474. Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net> Acked-by: Michael Karcher <flashrom@mkarcher.dialup.fu-berlin.de>
140 lines
3.8 KiB
C
140 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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*
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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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/* WARNING!
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This chip uses the standard JEDEC Addresses in 16-bit mode as word
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addresses. In byte mode, 0xAAA has to be used instead of 0x555 and
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0x555 instead of 0x2AA. Do *not* blindly replace with standard JEDEC
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functions. */
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/* chunksize is 1 */
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int write_m29f400bt(struct flashctx *flash, uint8_t *src, unsigned int start,
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unsigned int len)
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{
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int i;
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chipaddr bios = flash->virtual_memory;
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chipaddr dst = flash->virtual_memory + start;
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for (i = 0; i < len; i++) {
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chip_writeb(flash, 0xAA, bios + 0xAAA);
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chip_writeb(flash, 0x55, bios + 0x555);
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chip_writeb(flash, 0xA0, bios + 0xAAA);
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/* transfer data from source to destination */
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chip_writeb(flash, *src, dst);
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toggle_ready_jedec(flash, dst);
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#if 0
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/* We only want to print something in the error case. */
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msg_cerr("Value in the flash at address 0x%lx = %#x, want %#x\n",
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(dst - bios), chip_readb(flash, dst), *src);
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#endif
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dst++;
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src++;
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}
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/* FIXME: Ignore errors for now. */
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return 0;
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}
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int probe_m29f400bt(struct flashctx *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(flash, 0xAA, bios + 0xAAA);
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chip_writeb(flash, 0x55, bios + 0x555);
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chip_writeb(flash, 0x90, bios + 0xAAA);
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programmer_delay(10);
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id1 = chip_readb(flash, bios);
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/* The data sheet says id2 is at (bios + 0x01) and id2 listed in
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* flash.h does not match. It should be possible to use JEDEC probe.
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*/
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id2 = chip_readb(flash, bios + 0x02);
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chip_writeb(flash, 0xAA, bios + 0xAAA);
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chip_writeb(flash, 0x55, bios + 0x555);
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chip_writeb(flash, 0xF0, bios + 0xAAA);
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programmer_delay(10);
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msg_cdbg("%s: id1 0x%02x, id2 0x%02x\n", __func__, 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_m29f400bt(struct flashctx *flash)
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{
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chipaddr bios = flash->virtual_memory;
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chip_writeb(flash, 0xAA, bios + 0xAAA);
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chip_writeb(flash, 0x55, bios + 0x555);
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chip_writeb(flash, 0x80, bios + 0xAAA);
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chip_writeb(flash, 0xAA, bios + 0xAAA);
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chip_writeb(flash, 0x55, bios + 0x555);
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chip_writeb(flash, 0x10, bios + 0xAAA);
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programmer_delay(10);
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toggle_ready_jedec(flash, bios);
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/* FIXME: Check the status register for errors. */
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return 0;
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}
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int block_erase_m29f400bt(struct flashctx *flash, unsigned int start,
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unsigned int len)
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{
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chipaddr bios = flash->virtual_memory;
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chipaddr dst = bios + start;
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chip_writeb(flash, 0xAA, bios + 0xAAA);
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chip_writeb(flash, 0x55, bios + 0x555);
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chip_writeb(flash, 0x80, bios + 0xAAA);
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chip_writeb(flash, 0xAA, bios + 0xAAA);
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chip_writeb(flash, 0x55, bios + 0x555);
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chip_writeb(flash, 0x30, dst);
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programmer_delay(10);
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toggle_ready_jedec(flash, bios);
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/* FIXME: Check the status register for errors. */
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return 0;
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}
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int block_erase_chip_m29f400bt(struct flashctx *flash, unsigned int address,
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unsigned int blocklen)
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{
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if ((address != 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_m29f400bt(flash);
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}
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