1 /* $NetBSD: mcclock_tlsb.c,v 1.8 1998/05/13 02:50:29 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1997 by Matthew Jacob 5 * NASA AMES Research Center. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice immediately at the beginning of the file, without modification, 13 * this list of conditions, and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 24 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 34 35 __KERNEL_RCSID(0, "$NetBSD: mcclock_tlsb.c,v 1.8 1998/05/13 02:50:29 thorpej Exp $"); 36 37 #include <sys/param.h> 38 #include <sys/kernel.h> 39 #include <sys/systm.h> 40 #include <sys/device.h> 41 42 #include <machine/bus.h> 43 44 #include <dev/dec/clockvar.h> 45 #include <dev/dec/mcclockvar.h> 46 47 #include <alpha/tlsb/gbusvar.h> 48 49 #include <alpha/tlsb/tlsbreg.h> /* XXX */ 50 51 #include <dev/ic/mc146818reg.h> 52 53 #define KV(_addr) ((caddr_t)ALPHA_PHYS_TO_K0SEG((_addr))) 54 /* 55 * Registers are 64 bytes apart (and 1 byte wide) 56 */ 57 #define REGSHIFT 6 58 59 struct mcclock_tlsb_softc { 60 struct mcclock_softc sc_mcclock; 61 unsigned long regbase; 62 }; 63 64 int mcclock_tlsb_match __P((struct device *, struct cfdata *, void *)); 65 void mcclock_tlsb_attach __P((struct device *, struct device *, void *)); 66 67 struct cfattach mcclock_tlsb_ca = { 68 sizeof (struct mcclock_tlsb_softc), 69 mcclock_tlsb_match, 70 mcclock_tlsb_attach, 71 }; 72 73 extern struct cfdriver mcclock_cd; 74 75 static void mcclock_tlsb_write __P((struct mcclock_softc *, u_int, u_int)); 76 static u_int mcclock_tlsb_read __P((struct mcclock_softc *, u_int)); 77 78 const struct mcclock_busfns mcclock_tlsb_busfns = { 79 mcclock_tlsb_write, mcclock_tlsb_read, 80 }; 81 82 int 83 mcclock_tlsb_match(parent, match, aux) 84 struct device *parent; 85 struct cfdata *match; 86 void *aux; 87 { 88 struct gbus_attach_args *ga = aux; 89 if (strcmp(ga->ga_name, mcclock_cd.cd_name)) 90 return (0); 91 return (1); 92 } 93 94 void 95 mcclock_tlsb_attach(parent, self, aux) 96 struct device *parent, *self; 97 void *aux; 98 { 99 struct mcclock_tlsb_softc *sc = (struct mcclock_tlsb_softc *)self; 100 struct gbus_attach_args *ga = aux; 101 102 /* XXX Should be bus.h'd, so we can accomodate the kn7aa. */ 103 sc->regbase = TLSB_GBUS_BASE + ga->ga_offset; 104 105 mcclock_attach(&sc->sc_mcclock, &mcclock_tlsb_busfns); 106 } 107 108 static void 109 mcclock_tlsb_write(mcsc, reg, val) 110 struct mcclock_softc *mcsc; 111 u_int reg, val; 112 { 113 struct mcclock_tlsb_softc *sc = (struct mcclock_tlsb_softc *)mcsc; 114 unsigned char *ptr = (unsigned char *) 115 KV(sc->regbase + (reg << REGSHIFT)); 116 *ptr = val; 117 } 118 119 static u_int 120 mcclock_tlsb_read(mcsc, reg) 121 struct mcclock_softc *mcsc; 122 u_int reg; 123 { 124 struct mcclock_tlsb_softc *sc = (struct mcclock_tlsb_softc *)mcsc; 125 unsigned char *ptr = (unsigned char *) 126 KV(sc->regbase + (reg << REGSHIFT)); 127 return *ptr; 128 } 129