1/* $NetBSD: mcclock_isa.c,v 1.14 2011/02/08 20:20:09 rmind Exp $ */ 2/* $OpenBSD: clock_mc.c,v 1.9 1998/03/16 09:38:26 pefo Exp $ */ 3/* NetBSD: clock_mc.c,v 1.2 1995/06/28 04:30:30 cgd Exp */ 4 5/* 6 * Copyright (c) 1988 University of Utah. 7 * Copyright (c) 1992, 1993 8 * The Regents of the University of California. All rights reserved. 9 * 10 * This code is derived from software contributed to Berkeley by 11 * the Systems Programming Group of the University of Utah Computer 12 * Science Department and Ralph Campbell. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions 16 * are met: 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in the 21 * documentation and/or other materials provided with the distribution. 22 * 3. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * from: Utah Hdr: clock.c 1.18 91/01/21 39 * 40 * @(#)clock.c 8.1 (Berkeley) 6/10/93 41 */ 42 43#include <sys/cdefs.h> 44__KERNEL_RCSID(0, "$NetBSD: mcclock_isa.c,v 1.14 2011/02/08 20:20:09 rmind Exp $"); 45 46#include <sys/param.h> 47#include <sys/systm.h> 48#include <sys/device.h> 49 50#include <sys/bus.h> 51 52#include <dev/isa/isareg.h> 53#include <dev/isa/isavar.h> 54 55#include <dev/clock_subr.h> 56 57#include <dev/ic/mc146818reg.h> 58#include <dev/ic/mc146818var.h> 59 60#include <arc/isa/mcclock_isavar.h> 61 62int mcclock_isa_match(device_t, cfdata_t, void *); 63void mcclock_isa_attach(device_t, device_t, void *); 64 65CFATTACH_DECL_NEW(mcclock_isa, sizeof(struct mc146818_softc), 66 mcclock_isa_match, mcclock_isa_attach, NULL, NULL); 67 68/* Deskstation clock access code */ 69static u_int mc_isa_read(struct mc146818_softc *, u_int); 70static void mc_isa_write(struct mc146818_softc *, u_int, u_int); 71 72int mcclock_isa_conf = 0; 73 74int 75mcclock_isa_match(device_t parent, cfdata_t cf, void *aux) 76{ 77 struct isa_attach_args *ia = aux; 78 bus_space_handle_t ioh; 79 80 if (ia->ia_nio < 1 || 81 (ia->ia_io[0].ir_addr != ISA_UNKNOWN_PORT && 82 ia->ia_io[0].ir_addr != 0x70)) 83 return 0; 84 85 if (ia->ia_niomem > 0 && 86 (ia->ia_iomem[0].ir_addr != ISA_UNKNOWN_IOMEM)) 87 return 0; 88 89 if (ia->ia_nirq > 0 && 90 (ia->ia_irq[0].ir_irq != ISA_UNKNOWN_IRQ)) 91 return 0; 92 93 if (ia->ia_ndrq > 0 && 94 (ia->ia_drq[0].ir_drq != ISA_UNKNOWN_DRQ)) 95 return 0; 96 97 if (!mcclock_isa_conf) 98 return 0; 99 100 if (bus_space_map(ia->ia_iot, 0x70, 0x02, 0, &ioh)) 101 return 0; 102 103 bus_space_unmap(ia->ia_iot, ioh, 0x02); 104 105 ia->ia_nio = 1; 106 ia->ia_io[0].ir_addr = 0x70; 107 ia->ia_io[0].ir_size = 0x02; 108 109 ia->ia_niomem = 0; 110 ia->ia_nirq = 0; 111 ia->ia_ndrq = 0; 112 113 return 1; 114} 115 116void 117mcclock_isa_attach(device_t parent, device_t self, void *aux) 118{ 119 struct mc146818_softc *sc = device_private(self); 120 struct isa_attach_args *ia = aux; 121 122 sc->sc_dev = self; 123 sc->sc_bst = ia->ia_iot; 124 if (bus_space_map(sc->sc_bst, ia->ia_io[0].ir_addr, 125 ia->ia_io[0].ir_size, 0, &sc->sc_bsh)) 126 panic("mcclock_isa_attach: couldn't map clock I/O space"); 127 128 sc->sc_year0 = 1980; 129 sc->sc_mcread = mc_isa_read; 130 sc->sc_mcwrite = mc_isa_write; 131 132 mc146818_attach(sc); 133 134 aprint_normal("\n"); 135 136 /* Turn interrupts off, just in case. */ 137 mc_isa_write(sc, MC_REGB, MC_REGB_BINARY | MC_REGB_24HR); 138} 139 140u_int 141mc_isa_read(struct mc146818_softc *sc, u_int reg) 142{ 143 144 bus_space_write_1(sc->sc_bst, sc->sc_bsh, 0, reg); 145 return bus_space_read_1(sc->sc_bst, sc->sc_bsh, 1); 146} 147 148void 149mc_isa_write(struct mc146818_softc *sc, u_int reg, u_int datum) 150{ 151 152 bus_space_write_1(sc->sc_bst, sc->sc_bsh, 0, reg); 153 bus_space_write_1(sc->sc_bst, sc->sc_bsh, 1, datum); 154} 155 156