sys/arch/arm/ep93xx/eprtc.c

   1 /*      $NetBSD: eprtc.c,v 1.3 2009/12/12 14:44:08 tsutsui 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 1.3 2009/12/12 14:44:08 tsutsui 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 *, struct timeval *);
  55 static int eprtc_settime(struct todr_chip_handle *, struct timeval *);
  56
  57 static int
  58 eprtc_match(struct device *parent, struct cfdata *match, void *aux)
  59 {
  60         return 1;
  61 }
  62
  63 static void
  64 eprtc_attach(struct device *parent, struct device *self, void *aux)
  65 {
  66         struct eprtc_softc *sc = (struct eprtc_softc*)self;
  67         struct epsoc_attach_args *sa = aux;
  68
  69         printf("\n");
  70         sc->sc_iot = sa->sa_iot;
  71
  72         if (bus_space_map(sa->sa_iot, sa->sa_addr,
  73                           sa->sa_size, 0, &sc->sc_ioh)){
  74                 printf("%s: Cannot map registers", self->dv_xname);
  75                 return;
  76         }
  77
  78         sc->sc_todr.cookie = sc;
  79         sc->sc_todr.todr_gettime = eprtc_gettime;
  80         sc->sc_todr.todr_settime = eprtc_settime;
  81         sc->sc_todr.todr_setwen = NULL;
  82         todr_attach(&sc->sc_todr);
  83 }
  84
  85 static int
  86 eprtc_gettime(struct todr_chip_handle *ch, struct timeval *tv)
  87 {
  88         struct eprtc_softc *sc = ch->cookie;
  89
  90         tv->tv_sec = bus_space_read_4(sc->sc_iot, sc->sc_ioh, EP93XX_RTC_Data);
  91         tv->tv_usec = 0;
  92         return 0;
  93 }
  94
  95 static int
  96 eprtc_settime(struct todr_chip_handle *ch, struct timeval *tv)
  97 {
  98         struct eprtc_softc *sc = ch->cookie;
  99
 100         bus_space_write_4(sc->sc_iot, sc->sc_ioh, EP93XX_RTC_Load, tv->tv_sec);
 101         return 0;
 102 }