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