1 /* $NetBSD: vrdsu.c,v 1.4 2002/01/27 14:18:12 takemura 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/vripif.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(struct device *, struct cfdata *, void *); 46 static void vrdsuattach(struct device *, struct device *, void *); 47 48 static void vrdsu_write(struct vrdsu_softc *, int, unsigned short); 49 static unsigned short vrdsu_read(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(struct vrdsu_softc *sc, int port, unsigned short val) 59 { 60 61 bus_space_write_2(sc->sc_iot, sc->sc_ioh, port, val); 62 } 63 64 static inline unsigned short 65 vrdsu_read(struct vrdsu_softc *sc, int port) 66 { 67 68 return (bus_space_read_2(sc->sc_iot, sc->sc_ioh, port)); 69 } 70 71 static int 72 vrdsumatch(struct device *parent, struct cfdata *cf, void *aux) 73 { 74 75 return (1); 76 } 77 78 static void 79 vrdsuattach(struct device *parent, struct device *self, void *aux) 80 { 81 struct vrdsu_softc *sc = (struct vrdsu_softc *)self; 82 struct vrip_attach_args *va = aux; 83 84 sc->sc_iot = va->va_iot; 85 if (bus_space_map(va->va_iot, va->va_addr, va->va_size, 86 0, &sc->sc_ioh)) { 87 printf(": can't map bus space\n"); 88 return; 89 } 90 printf("\n"); 91 the_dsu_sc = sc; 92 } 93 94 void 95 vrdsu_reset() 96 { 97 98 if (the_dsu_sc) { 99 splhigh(); 100 vrdsu_write(the_dsu_sc, DSUSET_REG_W, 1); /* 1 sec */ 101 vrdsu_write(the_dsu_sc, DSUCNT_REG_W, DSUCNT_DSWEN); 102 while (1); 103 } else { 104 printf("%s(%d): There is no DSU.", __FILE__, __LINE__); 105 } 106 } 107