/*
 * This file is part of the flashrom project.
 *
 * Copyright (C) 2004 Tyan Corporation
 * Copyright (C) 2007 Nikolay Petukhov <nikolay.petukhov@gmail.com>
 * Copyright (C) 2007 Reinder E.N. de Haan <lb_reha@mveas.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"

static void write_lockbits_49fl00x(const struct flashctx *flash,
				   unsigned int size, unsigned char bits,
				   unsigned int block_size)
{
	unsigned int i, left = size;
	chipaddr bios = flash->virtual_registers;

	for (i = 0; left >= block_size; i++, left -= block_size) {
		/* pm49fl002 */
		if (block_size == 16384 && i % 2)
			continue;

		chip_writeb(flash, bits, bios + (i * block_size) + 2);
	}
}

int unlock_49fl00x(struct flashctx *flash)
{
	write_lockbits_49fl00x(flash, flash->total_size * 1024, 0,
			       flash->page_size);
	return 0;
}

int lock_49fl00x(struct flashctx *flash)
{
	write_lockbits_49fl00x(flash, flash->total_size * 1024, 1,
			       flash->page_size);
	return 0;
}