66 lines
1.6 KiB
C
66 lines
1.6 KiB
C
/*
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* (C) Copyright 2010 TomTom BV <http://www.tomtom.com>
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* Author: Matthias Kaehlcke <matthias.kaehlcke@tomtom.com>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (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., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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/*
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* Implementation of the flip-flop. This can store 1 bit of information
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* across a (watchdog) reset.
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*/
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#include <config.h>
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#ifdef CONFIG_SW_FLIPFLOP
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#include <asm/io.h>
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#include <asm/arch/omap3430.h>
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#include <flipflop.h>
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#define FLIP_FLOP_LOCATION (OMAP34XX_CTRL_BASE + 0x09FC)
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#define FLIP_FLOP_BIT 31
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void flipflop_set(int state)
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{
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unsigned long value= readl(FLIP_FLOP_LOCATION);
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if (state)
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value |= (1 << FLIP_FLOP_BIT);
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else
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value &= ~(1 << FLIP_FLOP_BIT);
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writel(value, FLIP_FLOP_LOCATION);
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}
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int flipflop_get(void)
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{
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const unsigned long value = readl(FLIP_FLOP_LOCATION);
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return (value & (1 << FLIP_FLOP_BIT));
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}
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void epicfail_reset(void)
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{
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writel(readl(FLIP_FLOP_LOCATION) & ~(1 << EPICFAIL_BIT),
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FLIP_FLOP_LOCATION);
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}
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#endif
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