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      1 /*	$NetBSD: iq31244_machdep.c,v 1.1 2009/01/09 16:23:59 briggs Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2009 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     26  * POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/cdefs.h>
     30 __KERNEL_RCSID(0, "$NetBSD: iq31244_machdep.c,v 1.1 2009/01/09 16:23:59 briggs Exp $");
     31 
     32 #include <sys/param.h>
     33 #include <sys/device.h>
     34 #include <sys/systm.h>
     35 #include <sys/kernel.h>
     36 #include <sys/reboot.h>
     37 
     38 #include <dev/i2c/m41st84var.h>
     39 
     40 void iq31244_reboot(int);	/* I80321_REBOOT */
     41 
     42 /*
     43  * Resetting the peripherals like the IQ80321 does isn't
     44  * a sufficient reset for the IQ31244.  With the stock
     45  * Redboot, that reset will leave it in the Redboot
     46  * debugger on reinit.
     47  * The IQ31244 has an M41ST84, however, that can reset
     48  * the board with the watchdog.  So we just set it to
     49  * do so here.
     50  * The wdog on the 41ST84 should probably be a real
     51  * device, but for now, we just kick it here.
     52  */
     53 void
     54 iq31244_reboot(int howto)
     55 {
     56 
     57 	/* We can't halt; just reset. */
     58 	if ((howto & RB_HALT) == 0) {
     59 		device_t	dv;
     60 
     61 		dv = device_find_by_xname("strtc0");
     62 		if (dv == NULL)
     63 		{
     64 			printf("No strtc0!  Reset will probably fail!\n");
     65 			return;
     66 		}
     67 
     68 		/*
     69 		 * 0x80 == steer to reset
     70 		 * 0x04 == multiplier 1, resolution 1/16s
     71 		 */
     72 		strtc_wdog_config(device_private(dv), 0x84);
     73 		delay(10000);
     74 	}
     75 }
     76