9a22d28e6e
Use this on the IQ31244 to force a watchdog reset from the M41ST84 if it's been attached. The generic reset doesn't fully reset the system whereas the RTC watchdog reset does.
76 lines
2.5 KiB
C
76 lines
2.5 KiB
C
/* $NetBSD: iq31244_machdep.c,v 1.1 2009/01/09 16:23:59 briggs Exp $ */
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/*
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* Copyright (c) 2009 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: iq31244_machdep.c,v 1.1 2009/01/09 16:23:59 briggs Exp $");
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#include <sys/param.h>
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#include <sys/device.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/reboot.h>
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#include <dev/i2c/m41st84var.h>
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void iq31244_reboot(int); /* I80321_REBOOT */
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/*
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* Resetting the peripherals like the IQ80321 does isn't
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* a sufficient reset for the IQ31244. With the stock
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* Redboot, that reset will leave it in the Redboot
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* debugger on reinit.
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* The IQ31244 has an M41ST84, however, that can reset
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* the board with the watchdog. So we just set it to
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* do so here.
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* The wdog on the 41ST84 should probably be a real
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* device, but for now, we just kick it here.
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*/
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void
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iq31244_reboot(int howto)
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{
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/* We can't halt; just reset. */
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if ((howto & RB_HALT) == 0) {
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device_t dv;
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dv = device_find_by_xname("strtc0");
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if (dv == NULL)
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{
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printf("No strtc0! Reset will probably fail!\n");
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return;
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}
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/*
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* 0x80 == steer to reset
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* 0x04 == multiplier 1, resolution 1/16s
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*/
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strtc_wdog_config(device_private(dv), 0x84);
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delay(10000);
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}
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}
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