1 /* $NetBSD: mcclock_tlsb.c,v 1.10 2002/10/02 04:06:40 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 1.10 2002/10/02 04:06:40 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 CFATTACH_DECL(mcclock_tlsb, sizeof (struct mcclock_tlsb_softc), 68 mcclock_tlsb_match, mcclock_tlsb_attach, NULL, NULL); 69 70 extern struct cfdriver mcclock_cd; 71 72 static void mcclock_tlsb_write __P((struct mcclock_softc *, u_int, u_int)); 73 static u_int mcclock_tlsb_read __P((struct mcclock_softc *, u_int)); 74 75 const struct mcclock_busfns mcclock_tlsb_busfns = { 76 mcclock_tlsb_write, mcclock_tlsb_read, 77 }; 78 79 int 80 mcclock_tlsb_match(parent, match, aux) 81 struct device *parent; 82 struct cfdata *match; 83 void *aux; 84 { 85 struct gbus_attach_args *ga = aux; 86 if (strcmp(ga->ga_name, mcclock_cd.cd_name)) 87 return (0); 88 return (1); 89 } 90 91 void 92 mcclock_tlsb_attach(parent, self, aux) 93 struct device *parent, *self; 94 void *aux; 95 { 96 struct mcclock_tlsb_softc *sc = (struct mcclock_tlsb_softc *)self; 97 struct gbus_attach_args *ga = aux; 98 99 /* XXX Should be bus.h'd, so we can accomodate the kn7aa. */ 100 sc->regbase = TLSB_GBUS_BASE + ga->ga_offset; 101 102 mcclock_attach(&sc->sc_mcclock, &mcclock_tlsb_busfns); 103 } 104 105 static void 106 mcclock_tlsb_write(mcsc, reg, val) 107 struct mcclock_softc *mcsc; 108 u_int reg, val; 109 { 110 struct mcclock_tlsb_softc *sc = (struct mcclock_tlsb_softc *)mcsc; 111 unsigned char *ptr = (unsigned char *) 112 KV(sc->regbase + (reg << REGSHIFT)); 113 *ptr = val; 114 } 115 116 static u_int 117 mcclock_tlsb_read(mcsc, reg) 118 struct mcclock_softc *mcsc; 119 u_int reg; 120 { 121 struct mcclock_tlsb_softc *sc = (struct mcclock_tlsb_softc *)mcsc; 122 unsigned char *ptr = (unsigned char *) 123 KV(sc->regbase + (reg << REGSHIFT)); 124 return *ptr; 125 } 126