1 /* $NetBSD: mcclock_pad32.c,v 1.9 1998/04/19 07:50:25 jonathan Exp $ */ 2 3 /* 4 * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University. 5 * All rights reserved. 6 * 7 * Author: Chris G. Demetriou 8 * 9 * Permission to use, copy, modify and distribute this software and 10 * its documentation is hereby granted, provided that both the copyright 11 * notice and this permission notice appear in all copies of the 12 * software, derivative works or modified versions, and any portions 13 * thereof, and that both notices appear in supporting documentation. 14 * 15 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 16 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 17 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 18 * 19 * Carnegie Mellon requests users of this software to return to 20 * 21 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 22 * School of Computer Science 23 * Carnegie Mellon University 24 * Pittsburgh PA 15213-3890 25 * 26 * any improvements or extensions that they make and grant Carnegie the 27 * rights to redistribute these changes. 28 */ 29 30 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 31 32 __KERNEL_RCSID(0, "$NetBSD: mcclock_pad32.c,v 1.9 1998/04/19 07:50:25 jonathan Exp $"); 33 34 35 /* 36 * mc1461818 (or compatible) clock chip driver, for machines where each 37 * byte-wide mcclock chip register is mapped 38 * into the low-order byte of a little-endian 32-bit word. 39 * 40 * DECstation 2100/3100 41 * DECstation 5100 42 * DECstation 5000/200 baseboard 43 * IOCTL asic machines (Alpha 3000 series, Decstation 5000 series) 44 * 45 * bus-specific frontends should just declare an attach and match 46 * entry, and set up a initializea switch to call the functions below. 47 */ 48 49 #include <sys/param.h> 50 #include <sys/kernel.h> 51 #include <sys/systm.h> 52 #include <sys/device.h> 53 54 #include <machine/autoconf.h> 55 #include <dev/dec/clockvar.h> 56 #include <dev/dec/mcclockvar.h> 57 #include <dev/ic/mc146818reg.h> 58 59 #include <dev/dec/mcclock_pad32.h> 60 61 62 void mcclock_pad32_write __P((struct mcclock_softc *, u_int, u_int)); 63 u_int mcclock_pad32_read __P((struct mcclock_softc *, u_int)); 64 65 const struct mcclock_busfns mcclock_pad32_busfns = { 66 mcclock_pad32_write, mcclock_pad32_read, 67 }; 68 69 void 70 mcclock_pad32_write(dev, reg, datum) 71 struct mcclock_softc *dev; 72 u_int reg, datum; 73 { 74 struct mcclock_pad32_softc *sc = (struct mcclock_pad32_softc *)dev; 75 76 sc->sc_dp[reg].datum = datum; 77 } 78 79 u_int 80 mcclock_pad32_read(dev, reg) 81 struct mcclock_softc *dev; 82 u_int reg; 83 { 84 struct mcclock_pad32_softc *sc = (struct mcclock_pad32_softc *)dev; 85 86 return (sc->sc_dp[reg].datum); 87 } 88