1 /* $NetBSD: clpsrtc.c,v 1.1 2013/04/28 11:57:13 kiyohara Exp $ */ 2 /* 3 * Copyright (c) 2013 KIYOHARA Takashi 4 * 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 ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 19 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 20 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 23 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 24 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25 * POSSIBILITY OF SUCH DAMAGE. 26 */ 27 #include <sys/cdefs.h> 28 __KERNEL_RCSID(0, "$NetBSD: clpsrtc.c,v 1.1 2013/04/28 11:57:13 kiyohara Exp $"); 29 30 #include <sys/param.h> 31 #include <sys/bus.h> 32 #include <sys/device.h> 33 #include <sys/errno.h> 34 35 #include <dev/clock_subr.h> 36 37 #include <arm/clps711x/clps711xreg.h> 38 #include <arm/clps711x/clpssocvar.h> 39 40 #include "locators.h" 41 42 struct clpsrtc_softc { 43 device_t sc_dev; 44 bus_space_tag_t sc_iot; 45 bus_space_handle_t sc_ioh; 46 47 struct todr_chip_handle sc_todr; 48 }; 49 50 static int clpsrtc_match(device_t, cfdata_t, void *); 51 static void clpsrtc_attach(device_t, device_t, void *); 52 53 /* todr(9) interfaces */ 54 static int clpsrtc_todr_gettime(todr_chip_handle_t, struct timeval *); 55 static int clpsrtc_todr_settime(todr_chip_handle_t, struct timeval *); 56 57 CFATTACH_DECL_NEW(clpsrtc, sizeof(struct clpsrtc_softc), 58 clpsrtc_match, clpsrtc_attach, NULL, NULL); 59 60 61 /* ARGSUSED */ 62 static int 63 clpsrtc_match(device_t parent, cfdata_t match, void *aux) 64 { 65 66 return 1; 67 } 68 69 /* ARGSUSED */ 70 static void 71 clpsrtc_attach(device_t parent, device_t self, void *aux) 72 { 73 struct clpsrtc_softc *sc = device_private(self); 74 struct clpssoc_attach_args *aa = aux; 75 76 aprint_naive("\n"); 77 aprint_normal("\n"); 78 79 sc->sc_dev = self; 80 sc->sc_iot = aa->aa_iot; 81 sc->sc_ioh = *aa->aa_ioh; 82 83 /* XXXX: reset to compare registers */ 84 bus_space_write_4(sc->sc_iot, sc->sc_ioh, PS711X_RTCMR, 0); 85 86 sc->sc_todr.cookie = sc; 87 sc->sc_todr.todr_gettime = clpsrtc_todr_gettime; 88 sc->sc_todr.todr_settime = clpsrtc_todr_settime; 89 sc->sc_todr.todr_setwen = NULL; 90 todr_attach(&sc->sc_todr); 91 } 92 93 static int 94 clpsrtc_todr_gettime(todr_chip_handle_t ch, struct timeval *tv) 95 { 96 struct clpsrtc_softc *sc = ch->cookie; 97 98 tv->tv_sec = bus_space_read_4(sc->sc_iot, sc->sc_ioh, PS711X_RTCDR); 99 tv->tv_usec = 0; 100 return 0; 101 } 102 103 static int 104 clpsrtc_todr_settime(todr_chip_handle_t ch, struct timeval *tv) 105 { 106 struct clpsrtc_softc *sc = ch->cookie; 107 108 bus_space_write_4(sc->sc_iot, sc->sc_ioh, PS711X_RTCDR, tv->tv_sec); 109 return 0; 110 } 111