1 /* $NetBSD: eprtc.c,v 1.6 2012/10/27 17:17:37 chs 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 1.6 2012/10/27 17:17:37 chs 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 <sys/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 bus_space_tag_t sc_iot; 43 bus_space_handle_t sc_ioh; 44 struct todr_chip_handle sc_todr; 45 }; 46 47 static int eprtc_match(device_t, cfdata_t, void *); 48 static void eprtc_attach(device_t, device_t, void *); 49 50 CFATTACH_DECL_NEW(eprtc, sizeof(struct eprtc_softc), 51 eprtc_match, eprtc_attach, NULL, NULL); 52 53 static int eprtc_gettime(struct todr_chip_handle *, struct timeval *); 54 static int eprtc_settime(struct todr_chip_handle *, struct timeval *); 55 56 static int 57 eprtc_match(device_t parent, cfdata_t match, void *aux) 58 { 59 return 1; 60 } 61 62 static void 63 eprtc_attach(device_t parent, device_t self, void *aux) 64 { 65 struct eprtc_softc *sc = device_private(self); 66 struct epsoc_attach_args *sa = aux; 67 68 printf("\n"); 69 sc->sc_iot = sa->sa_iot; 70 71 if (bus_space_map(sa->sa_iot, sa->sa_addr, 72 sa->sa_size, 0, &sc->sc_ioh)) { 73 printf("%s: Cannot map registers", device_xname(self)); 74 return; 75 } 76 77 sc->sc_todr.cookie = sc; 78 sc->sc_todr.todr_gettime = eprtc_gettime; 79 sc->sc_todr.todr_settime = eprtc_settime; 80 sc->sc_todr.todr_setwen = NULL; 81 todr_attach(&sc->sc_todr); 82 } 83 84 static int 85 eprtc_gettime(struct todr_chip_handle *ch, struct timeval *tv) 86 { 87 struct eprtc_softc *sc = ch->cookie; 88 89 tv->tv_sec = bus_space_read_4(sc->sc_iot, sc->sc_ioh, EP93XX_RTC_Data); 90 tv->tv_usec = 0; 91 return 0; 92 } 93 94 static int 95 eprtc_settime(struct todr_chip_handle *ch, struct timeval *tv) 96 { 97 struct eprtc_softc *sc = ch->cookie; 98 99 bus_space_write_4(sc->sc_iot, sc->sc_ioh, EP93XX_RTC_Load, tv->tv_sec); 100 return 0; 101 } 102