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Viewing changes to arch/arm/mach-footbridge/include/mach/system.h

  • Committer: Package Import Robot
  • Author(s): Alessio Igor Bogani
  • Date: 2011-10-26 11:13:05 UTC
  • Revision ID: package-import@ubuntu.com-20111026111305-tz023xykf0i6eosh
Tags: upstream-3.2.0
Import upstream version 3.2.0

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arch/arm/mach-footbridge/include/mach/system.h
 
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/*
 
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 *  arch/arm/mach-footbridge/include/mach/system.h
 
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 *
 
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 *  Copyright (C) 1996-1999 Russell King.
 
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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 version 2 as
 
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 * published by the Free Software Foundation.
 
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 */
 
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#include <linux/io.h>
 
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#include <asm/hardware/dec21285.h>
 
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#include <mach/hardware.h>
 
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#include <asm/leds.h>
 
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#include <asm/mach-types.h>
 
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static inline void arch_idle(void)
 
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{
 
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        cpu_do_idle();
 
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}
 
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static inline void arch_reset(char mode, const char *cmd)
 
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{
 
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        if (mode == 's') {
 
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                /*
 
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                 * Jump into the ROM
 
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                 */
 
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                cpu_reset(0x41000000);
 
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        } else {
 
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                if (machine_is_netwinder()) {
 
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                        /* open up the SuperIO chip
 
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                         */
 
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                        outb(0x87, 0x370);
 
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                        outb(0x87, 0x370);
 
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                        /* aux function group 1 (logical device 7)
 
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                         */
 
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                        outb(0x07, 0x370);
 
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                        outb(0x07, 0x371);
 
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                        /* set GP16 for WD-TIMER output
 
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                         */
 
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                        outb(0xe6, 0x370);
 
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                        outb(0x00, 0x371);
 
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                        /* set a RED LED and toggle WD_TIMER for rebooting
 
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                         */
 
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                        outb(0xc4, 0x338);
 
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                } else {
 
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                        /* 
 
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                         * Force the watchdog to do a CPU reset.
 
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                         *
 
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                         * After making sure that the watchdog is disabled
 
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                         * (so we can change the timer registers) we first
 
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                         * enable the timer to autoreload itself.  Next, the
 
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                         * timer interval is set really short and any
 
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                         * current interrupt request is cleared (so we can
 
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                         * see an edge transition).  Finally, TIMER4 is
 
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                         * enabled as the watchdog.
 
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                         */
 
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                        *CSR_SA110_CNTL &= ~(1 << 13);
 
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                        *CSR_TIMER4_CNTL = TIMER_CNTL_ENABLE |
 
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                                           TIMER_CNTL_AUTORELOAD |
 
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                                           TIMER_CNTL_DIV16;
 
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                        *CSR_TIMER4_LOAD = 0x2;
 
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                        *CSR_TIMER4_CLR  = 0;
 
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                        *CSR_SA110_CNTL |= (1 << 13);
 
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                }
 
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        }
 
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}