1 /* $NetBSD: eprtc.c,v 1.2 2006/09/04 23:45:30 gdamore Exp $ */ 2 3 /* 4 * Copyright (c) 2005 HAMAJIMA Katsuomi. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __KERNEL_RCSID(0, "$NetBSD: eprtc.c,v 1.2 2006/09/04 23:45:30 gdamore Exp $"); 30 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/kernel.h> 34 #include <sys/device.h> 35 #include <dev/clock_subr.h> 36 #include <machine/bus.h> 37 #include <arm/ep93xx/ep93xxvar.h> 38 #include <arm/ep93xx/epsocvar.h> 39 #include <arm/ep93xx/eprtcreg.h> 40 41 struct eprtc_softc { 42 struct device sc_dev; 43 bus_space_tag_t sc_iot; 44 bus_space_handle_t sc_ioh; 45 struct todr_chip_handle sc_todr; 46 }; 47 48 static int eprtc_match(struct device *, struct cfdata *, void *); 49 static void eprtc_attach(struct device *, struct device *, void *); 50 51 CFATTACH_DECL(eprtc, sizeof(struct eprtc_softc), 52 eprtc_match, eprtc_attach, NULL, NULL); 53 54 static int eprtc_gettime(struct todr_chip_handle *, 55 volatile struct timeval *); 56 static int eprtc_settime(struct todr_chip_handle *, 57 volatile struct timeval *); 58 59 static int 60 eprtc_match(struct device *parent, struct cfdata *match, void *aux) 61 { 62 return 1; 63 } 64 65 static void 66 eprtc_attach(struct device *parent, struct device *self, void *aux) 67 { 68 struct eprtc_softc *sc = (struct eprtc_softc*)self; 69 struct epsoc_attach_args *sa = aux; 70 71 printf("\n"); 72 sc->sc_iot = sa->sa_iot; 73 74 if (bus_space_map(sa->sa_iot, sa->sa_addr, 75 sa->sa_size, 0, &sc->sc_ioh)){ 76 printf("%s: Cannot map registers", self->dv_xname); 77 return; 78 } 79 80 sc->sc_todr.cookie = sc; 81 sc->sc_todr.todr_gettime = eprtc_gettime; 82 sc->sc_todr.todr_settime = eprtc_settime; 83 sc->sc_todr.todr_setwen = NULL; 84 todr_attach(&sc->sc_todr); 85 } 86 87 static int 88 eprtc_gettime(struct todr_chip_handle *ch, volatile struct timeval *tv) 89 { 90 struct eprtc_softc *sc = ch->cookie;; 91 92 tv->tv_sec = bus_space_read_4(sc->sc_iot, sc->sc_ioh, EP93XX_RTC_Data); 93 tv->tv_usec = 0; 94 return 0; 95 } 96 97 static int 98 eprtc_settime(struct todr_chip_handle *ch, volatile struct timeval *tv) 99 { 100 struct eprtc_softc *sc = ch->cookie;; 101 102 bus_space_write_4(sc->sc_iot, sc->sc_ioh, EP93XX_RTC_Load, tv->tv_sec); 103 return 0; 104 } 105