mcclock_pnpbus.c revision 1.1.2.2
1 1.1.2.2 chap /* $NetBSD: mcclock_pnpbus.c,v 1.1.2.2 2006/06/19 03:45:06 chap Exp $ */ 2 1.1.2.2 chap /*- 3 1.1.2.2 chap * Copyright (c) 2006 The NetBSD Foundation, Inc. 4 1.1.2.2 chap * All rights reserved. 5 1.1.2.2 chap * 6 1.1.2.2 chap * This code is derived from software contributed to The NetBSD Foundation 7 1.1.2.2 chap * by Tim Rightnour 8 1.1.2.2 chap * 9 1.1.2.2 chap * Redistribution and use in source and binary forms, with or without 10 1.1.2.2 chap * modification, are permitted provided that the following conditions 11 1.1.2.2 chap * are met: 12 1.1.2.2 chap * 1. Redistributions of source code must retain the above copyright 13 1.1.2.2 chap * notice, this list of conditions and the following disclaimer. 14 1.1.2.2 chap * 2. Redistributions in binary form must reproduce the above copyright 15 1.1.2.2 chap * notice, this list of conditions and the following disclaimer in the 16 1.1.2.2 chap * documentation and/or other materials provided with the distribution. 17 1.1.2.2 chap * 3. All advertising materials mentioning features or use of this software 18 1.1.2.2 chap * must display the following acknowledgement: 19 1.1.2.2 chap * This product includes software developed by the NetBSD 20 1.1.2.2 chap * Foundation, Inc. and its contributors. 21 1.1.2.2 chap * 4. Neither the name of The NetBSD Foundation nor the names of its 22 1.1.2.2 chap * contributors may be used to endorse or promote products derived 23 1.1.2.2 chap * from this software without specific prior written permission. 24 1.1.2.2 chap * 25 1.1.2.2 chap * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 26 1.1.2.2 chap * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 1.1.2.2 chap * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 1.1.2.2 chap * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 29 1.1.2.2 chap * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 1.1.2.2 chap * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 1.1.2.2 chap * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 1.1.2.2 chap * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 1.1.2.2 chap * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 1.1.2.2 chap * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 1.1.2.2 chap * POSSIBILITY OF SUCH DAMAGE. 36 1.1.2.2 chap */ 37 1.1.2.2 chap 38 1.1.2.2 chap /* 39 1.1.2.2 chap * PNPBus driver for the mc146818 compatible time-of-day clock found on all 40 1.1.2.2 chap * IBM Prep machines. This one is only discernable from the motorola clock 41 1.1.2.2 chap * part by the interface portion of the residual data. (or by the small vendor 42 1.1.2.2 chap * item chip id) 43 1.1.2.2 chap * NOTE: The IBM machines actually have either a dallas 1385 or a dallas 1585 44 1.1.2.2 chap * chip. This driver should probably be replaced by something that does that 45 1.1.2.2 chap * one day. 46 1.1.2.2 chap */ 47 1.1.2.2 chap 48 1.1.2.2 chap #include <sys/cdefs.h> 49 1.1.2.2 chap __KERNEL_RCSID(0, "$NetBSD: mcclock_pnpbus.c,v 1.1.2.2 2006/06/19 03:45:06 chap Exp $"); 50 1.1.2.2 chap 51 1.1.2.2 chap #include <sys/types.h> 52 1.1.2.2 chap #include <sys/param.h> 53 1.1.2.2 chap #include <sys/systm.h> 54 1.1.2.2 chap #include <sys/device.h> 55 1.1.2.2 chap #include <sys/malloc.h> 56 1.1.2.2 chap 57 1.1.2.2 chap #include <machine/bus.h> 58 1.1.2.2 chap #include <machine/intr.h> 59 1.1.2.2 chap #include <machine/isa_machdep.h> 60 1.1.2.2 chap #include <machine/residual.h> 61 1.1.2.2 chap 62 1.1.2.2 chap #include <dev/clock_subr.h> 63 1.1.2.2 chap #include <dev/ic/mc146818reg.h> 64 1.1.2.2 chap #include <dev/ic/mc146818var.h> 65 1.1.2.2 chap 66 1.1.2.2 chap #include <dev/isa/isavar.h> 67 1.1.2.2 chap 68 1.1.2.2 chap #include <prep/pnpbus/pnpbusvar.h> 69 1.1.2.2 chap 70 1.1.2.2 chap static int mcclock_pnpbus_probe(struct device *, struct cfdata *, void *); 71 1.1.2.2 chap static void mcclock_pnpbus_attach(struct device *, struct device *, void *); 72 1.1.2.2 chap 73 1.1.2.2 chap CFATTACH_DECL(mcclock_pnpbus, sizeof (struct mc146818_softc), 74 1.1.2.2 chap mcclock_pnpbus_probe, mcclock_pnpbus_attach, NULL, NULL); 75 1.1.2.2 chap 76 1.1.2.2 chap void mcclock_pnpbus_write(struct mc146818_softc *, u_int, u_int); 77 1.1.2.2 chap u_int mcclock_pnpbus_read(struct mc146818_softc *, u_int); 78 1.1.2.2 chap 79 1.1.2.2 chap static int 80 1.1.2.2 chap mcclock_pnpbus_probe(struct device *parent, struct cfdata *match, void *aux) 81 1.1.2.2 chap { 82 1.1.2.2 chap struct pnpbus_dev_attach_args *pna = aux; 83 1.1.2.2 chap int ret = 0; 84 1.1.2.2 chap 85 1.1.2.2 chap if (strcmp(pna->pna_devid, "PNP0B00") == 0 && 86 1.1.2.2 chap pna->subtype == RealTimeClock && pna->interface == ISA_RTC) 87 1.1.2.2 chap ret = 1; 88 1.1.2.2 chap 89 1.1.2.2 chap if (ret) 90 1.1.2.2 chap pnpbus_scan(pna, pna->pna_ppc_dev); 91 1.1.2.2 chap return ret; 92 1.1.2.2 chap } 93 1.1.2.2 chap 94 1.1.2.2 chap static void 95 1.1.2.2 chap mcclock_pnpbus_attach(struct device *parent, struct device *self, void *aux) 96 1.1.2.2 chap { 97 1.1.2.2 chap struct mc146818_softc *sc = (void *)self; 98 1.1.2.2 chap struct pnpbus_dev_attach_args *pna = aux; 99 1.1.2.2 chap 100 1.1.2.2 chap sc->sc_bst = pna->pna_iot; 101 1.1.2.2 chap if (pnpbus_io_map(&pna->pna_res, 0, &sc->sc_bst, &sc->sc_bsh)) { 102 1.1.2.2 chap /* XXX should we panic instead? */ 103 1.1.2.2 chap aprint_error("%s: couldn't map clock I/O space", 104 1.1.2.2 chap device_xname(self)); 105 1.1.2.2 chap return; 106 1.1.2.2 chap } 107 1.1.2.2 chap 108 1.1.2.2 chap sc->sc_year0 = 1900; 109 1.1.2.2 chap sc->sc_mcread = mcclock_pnpbus_read; 110 1.1.2.2 chap sc->sc_mcwrite = mcclock_pnpbus_write; 111 1.1.2.2 chap sc->sc_flag = MC146818_BCD; 112 1.1.2.2 chap mc146818_attach(sc); 113 1.1.2.2 chap 114 1.1.2.2 chap aprint_normal("\n"); 115 1.1.2.2 chap 116 1.1.2.2 chap (*sc->sc_mcwrite)(sc, MC_REGB, MC_REGB_24HR); 117 1.1.2.2 chap todr_attach(&sc->sc_handle); 118 1.1.2.2 chap } 119 1.1.2.2 chap 120 1.1.2.2 chap void 121 1.1.2.2 chap mcclock_pnpbus_write(struct mc146818_softc *sc, u_int reg, u_int datum) 122 1.1.2.2 chap { 123 1.1.2.2 chap bus_space_tag_t iot; 124 1.1.2.2 chap bus_space_handle_t ioh; 125 1.1.2.2 chap 126 1.1.2.2 chap iot = sc->sc_bst; 127 1.1.2.2 chap ioh = sc->sc_bsh; 128 1.1.2.2 chap 129 1.1.2.2 chap bus_space_write_1(iot, ioh, 0, reg); 130 1.1.2.2 chap bus_space_write_1(iot, ioh, 1, datum); 131 1.1.2.2 chap } 132 1.1.2.2 chap 133 1.1.2.2 chap u_int 134 1.1.2.2 chap mcclock_pnpbus_read(struct mc146818_softc *sc, u_int reg) 135 1.1.2.2 chap { 136 1.1.2.2 chap bus_space_tag_t iot; 137 1.1.2.2 chap bus_space_handle_t ioh; 138 1.1.2.2 chap u_int datum; 139 1.1.2.2 chap 140 1.1.2.2 chap iot = sc->sc_bst; 141 1.1.2.2 chap ioh = sc->sc_bsh; 142 1.1.2.2 chap 143 1.1.2.2 chap bus_space_write_1(iot, ioh, 0, reg); 144 1.1.2.2 chap datum = bus_space_read_1(iot, ioh, 1); 145 1.1.2.2 chap 146 1.1.2.2 chap return (datum); 147 1.1.2.2 chap } 148
Indexes created Wed Oct 29 20:09:47 GMT 2025