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vrdsu.c revision 1.2 
      1 /*	$NetBSD: vrdsu.c,v 1.2 1999/12/14 04:21:10 sato Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1999 Shin Takemura All rights reserved.
      5  * Copyright (c) 1999 PocketBSD Project. 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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/param.h>
     30 #include <sys/systm.h>
     31 #include <sys/device.h>
     32 
     33 #include <machine/bus.h>
     34 
     35 #include <hpcmips/vr/vripvar.h>
     36 #include <hpcmips/vr/dsureg.h>
     37 #include <hpcmips/vr/vrdsuvar.h>
     38 
     39 struct vrdsu_softc {
     40 	struct device sc_dev;
     41 	bus_space_tag_t sc_iot;
     42 	bus_space_handle_t sc_ioh;
     43 };
     44 
     45 static int vrdsumatch __P((struct device *, struct cfdata *, void *));
     46 static void vrdsuattach __P((struct device *, struct device *, void *));
     47 
     48 static void vrdsu_write __P((struct vrdsu_softc *, int, unsigned short));
     49 static unsigned short vrdsu_read __P((struct vrdsu_softc *, int));
     50 
     51 struct cfattach vrdsu_ca = {
     52 	sizeof(struct vrdsu_softc), vrdsumatch, vrdsuattach
     53 };
     54 
     55 struct vrdsu_softc *the_dsu_sc = NULL;
     56 
     57 static inline void
     58 vrdsu_write(sc, port, val)
     59 	struct vrdsu_softc *sc;
     60 	int port;
     61 	unsigned short val;
     62 {
     63 	bus_space_write_2(sc->sc_iot, sc->sc_ioh, port, val);
     64 }
     65 
     66 static inline unsigned short
     67 vrdsu_read(sc, port)
     68 	struct vrdsu_softc *sc;
     69 	int port;
     70 {
     71 	return bus_space_read_2(sc->sc_iot, sc->sc_ioh, port);
     72 }
     73 
     74 static int
     75 vrdsumatch(parent, cf, aux)
     76 	struct device *parent;
     77 	struct cfdata *cf;
     78 	void *aux;
     79 {
     80 	return 1;
     81 }
     82 
     83 static void
     84 vrdsuattach(parent, self, aux)
     85 	struct device *parent;
     86 	struct device *self;
     87 	void *aux;
     88 {
     89 	struct vrdsu_softc *sc = (struct vrdsu_softc *)self;
     90 	struct vrip_attach_args *va = aux;
     91 
     92 	sc->sc_iot = va->va_iot;
     93 	if (bus_space_map(va->va_iot, va->va_addr, va->va_size,
     94 			  0, &sc->sc_ioh)) {
     95 		printf(": can't map bus space\n");
     96 		return;
     97 	}
     98 	printf("\n");
     99 	the_dsu_sc = sc;
    100 }
    101 
    102 void
    103 vrdsu_reset()
    104 {
    105 	if (the_dsu_sc) {
    106 		splhigh();
    107 		vrdsu_write(the_dsu_sc, DSUSET_REG_W, 1); /* 1 sec */
    108 		vrdsu_write(the_dsu_sc, DSUCNT_REG_W, DSUCNT_DSWEN);
    109 		while (1);
    110 	} else {
    111 		printf("%s(%d): There is no DSU.", __FILE__, __LINE__);
    112 	}
    113 }
    114