/* $NetBSD: aurtc.c,v 1.16 2025/09/07 21:45:14 thorpej Exp $ */ /*- * Copyright (c) 2006 Itronix Inc. * All rights reserved. * * Written by Garrett D'Amore for Itronix Inc. * * 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. * 3. The name of Itronix Inc. may not be used to endorse * or promote products derived from this software without specific * prior written permission. * * THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``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 ITRONIX INC. 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. */ /* * Copyright 2002 Wasabi Systems, Inc. * All rights reserved. * * Written by Simon Burge for Wasabi Systems, Inc. * * 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed for the NetBSD Project by * Wasabi Systems, Inc. * 4. The name of Wasabi Systems, Inc. may not be used to endorse * or promote products derived from this software without specific prior * written permission. * * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC * 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 <sys/cdefs.h> __KERNEL_RCSID(0, "$NetBSD: aurtc.c,v 1.16 2025/09/07 21:45:14 thorpej Exp $"); #include <sys/param.h> #include <sys/systm.h> #include <sys/errno.h> #include <sys/device.h> #include <sys/proc.h> #include <dev/clock_subr.h> #include <sys/bus.h> #include <mips/alchemy/include/aureg.h> #include <mips/alchemy/include/auvar.h> #include <mips/alchemy/include/aubusvar.h> #define REGVAL(x) (*(volatile uint32_t *)(MIPS_PHYS_TO_KSEG1(PC_BASE + (x)))) #define GETREG(x) (REGVAL(x)) #define PUTREG(x,v) (REGVAL(x) = (v)) struct aurtc_softc { device_t sc_dev; struct todr_chip_handle sc_tch; void *sc_shutdownhook; }; static int aurtc_match(device_t, struct cfdata *, void *); static void aurtc_attach(device_t, device_t, void *); static int aurtc_gettime(todr_chip_handle_t, struct timeval *); static int aurtc_settime(todr_chip_handle_t, struct timeval *); static void aurtc_shutdown(void *); CFATTACH_DECL_NEW(aurtc, sizeof (struct aurtc_softc), aurtc_match, aurtc_attach, NULL, NULL); int aurtc_match(device_t parent, struct cfdata *match, void *aux) { struct aubus_attach_args *aa = aux; if (strcmp(aa->aa_name, match->cf_name) == 0) return (1); return (0); } void aurtc_attach(device_t parent, device_t self, void *aux) { struct aurtc_softc *sc = device_private(self); printf(": Au1X00 programmable clock\n"); sc->sc_dev = self; sc->sc_tch.todr_dev = self; sc->sc_tch.todr_gettime = aurtc_gettime; sc->sc_tch.todr_settime = aurtc_settime; sc->sc_shutdownhook = shutdownhook_establish(aurtc_shutdown, NULL); todr_attach(&sc->sc_tch); } /* * Note that our RTC only has second resolution. */ int aurtc_gettime(todr_chip_handle_t tch, struct timeval *tv) { int s; s = splclock(); tv->tv_sec = GETREG(PC_COUNTER_READ_0); splx(s); return 0; } int aurtc_settime(todr_chip_handle_t tch, struct timeval *tvp) { int s; struct timeval tv; s = splclock(); tv = *tvp; splx(s); /* wait for the clock register to be idle */ while (GETREG(PC_COUNTER_CONTROL) & CC_C0S) { continue; } PUTREG(PC_COUNTER_WRITE0, tv.tv_sec); /* * It could take a second or two for the clock change to take effect. * We don't want to make settimeofday() take that long, so we don't * wait here, but instead wait in flush. This can have a bad effect * for settimeofday() calls with a short window between them. */ return 0; } void aurtc_shutdown(void *arg) { /* wait for the clock register to be idle */ while (GETREG(PC_COUNTER_CONTROL) & CC_C0S) { continue; } }
