/* $NetBSD: mcclock_frodo.c,v 1.1.68.1 2024/06/22 10:57:10 martin Exp $ */ /*- * Copyright (c) 2014 Izumi Tsutsui. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include __KERNEL_RCSID(0, "$NetBSD: mcclock_frodo.c,v 1.1.68.1 2024/06/22 10:57:10 martin Exp $"); #include #include #include #include #include #include #include #include #include #include "ioconf.h" static int mcclock_frodo_probe(device_t, cfdata_t, void *); static void mcclock_frodo_attach(device_t, device_t, void *); static u_int mcclock_frodo_read(struct mc146818_softc *, u_int); static void mcclock_frodo_write(struct mc146818_softc *, u_int, u_int); CFATTACH_DECL_NEW(mcclock_frodo, sizeof(struct mc146818_softc), mcclock_frodo_probe, mcclock_frodo_attach, NULL, NULL); #define MCCLOCK_FRODO_NPORTS 2 static int mcclock_frodo_probe(device_t parent, cfdata_t cf, void *aux) { struct frodo_attach_args *fa = aux; /* only 425e has a valid mcclock */ if (machineid != HP_425 || mmuid != MMUID_425_E) return 0; if (strcmp(fa->fa_name, mcclock_cd.cd_name) != 0) return 0; if (fa->fa_offset != FRODO_CALENDAR) return 0; return 1; } static void mcclock_frodo_attach(device_t parent, device_t self, void *aux) { struct mc146818_softc *sc = device_private(self); struct frodo_attach_args *fa = aux; sc->sc_dev = self; sc->sc_bst = fa->fa_bst; if (bus_space_map(sc->sc_bst, fa->fa_base + fa->fa_offset, MCCLOCK_FRODO_NPORTS << 2, 0, &sc->sc_bsh) != 0) { aprint_error(": can't map register\n"); return; } sc->sc_year0 = 1900; sc->sc_mcread = mcclock_frodo_read; sc->sc_mcwrite = mcclock_frodo_write; sc->sc_flag = 0; mc146818_attach(sc); aprint_normal("\n"); /* XXX: not sure which mode (BINARY or BCD) is used on HP-UX */ mcclock_frodo_write(sc, MC_REGB, MC_REGB_BINARY | MC_REGB_24HR); /* make sure to start the 32.768kHz OSC */ mcclock_frodo_write(sc, MC_REGA, (mcclock_frodo_read(sc, MC_REGA) & ~MC_REGA_DVMASK) | MC_BASE_32_KHz); } /* * mc146818 calendar chip in the frodo utility chip is can be accessed * via register port at offset 0x80 and data port at offset 0x84. * * Note 4 byte offset stride is handled by frodo bus_space(9) layer, * so bus_space_read(9) and bus_space_write(9) takes 0 or 1 as offset * to access these registers. */ static void mcclock_frodo_write(struct mc146818_softc *sc, u_int reg, u_int datum) { bus_space_tag_t iot; bus_space_handle_t ioh; iot = sc->sc_bst; ioh = sc->sc_bsh; bus_space_write_1(iot, ioh, 0, reg); bus_space_write_1(iot, ioh, 1, datum); } static u_int mcclock_frodo_read(struct mc146818_softc *sc, u_int reg) { bus_space_tag_t iot; bus_space_handle_t ioh; u_int datum; iot = sc->sc_bst; ioh = sc->sc_bsh; bus_space_write_1(iot, ioh, 0, reg); datum = bus_space_read_1(iot, ioh, 1); return datum; }