1 /* $NetBSD: pl030_rtc.c,v 1.8 2007/02/19 02:08:12 briggs Exp $ */ 2 3 /* 4 * Copyright (c) 2001 ARM Ltd 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the company may not be used to endorse or promote 16 * products derived from this software without specific prior written 17 * permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 20 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 21 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 23 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 24 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 25 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 /* Include header files */ 33 34 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: pl030_rtc.c,v 1.8 2007/02/19 02:08:12 briggs Exp $"); 36 37 #include <sys/types.h> 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/kernel.h> 41 #include <sys/time.h> 42 #include <sys/device.h> 43 44 #include <dev/clock_subr.h> 45 46 #include <arm/cpufunc.h> 47 #include <machine/intr.h> 48 #include <evbarm/ifpga/ifpgavar.h> 49 #include <evbarm/ifpga/ifpgamem.h> 50 #include <evbarm/ifpga/ifpgareg.h> 51 52 #define PL030_RTC_SIZE 0x14 53 54 struct plrtc_softc { 55 struct device sc_dev; 56 bus_space_tag_t sc_iot; 57 bus_space_handle_t sc_ioh; 58 struct todr_chip_handle sc_todr; 59 }; 60 61 static int plrtc_probe (struct device *, struct cfdata *, void *); 62 static void plrtc_attach (struct device *, struct device *, void *); 63 64 CFATTACH_DECL(plrtc, sizeof(struct plrtc_softc), 65 plrtc_probe, plrtc_attach, NULL, NULL); 66 67 static int 68 plrtc_gettime(todr_chip_handle_t todr, volatile struct timeval *tv) 69 { 70 struct plrtc_softc *sc; 71 72 sc = (struct plrtc_softc *)todr->cookie; 73 tv->tv_sec = bus_space_read_4(sc->sc_iot, sc->sc_ioh, IFPGA_RTC_DR); 74 /* initialize tv_usec? */ 75 return 0; 76 } 77 78 static int 79 plrtc_settime(todr_chip_handle_t todr, volatile struct timeval *tv) 80 { 81 struct plrtc_softc *sc; 82 83 sc = (struct plrtc_softc *)todr->cookie; 84 bus_space_write_4(sc->sc_iot, sc->sc_ioh, IFPGA_RTC_LR, tv->tv_sec); 85 return 0; 86 } 87 88 static int 89 plrtc_probe(struct device *parent, struct cfdata *cf, void *aux) 90 { 91 return 1; 92 } 93 94 static void 95 plrtc_attach(struct device *parent, struct device *self, void *aux) 96 { 97 struct ifpga_attach_args *ifa = aux; 98 struct plrtc_softc *sc = (struct plrtc_softc *)self; 99 100 sc->sc_iot = ifa->ifa_iot; 101 if (bus_space_map(ifa->ifa_iot, ifa->ifa_addr, PL030_RTC_SIZE, 0, 102 &sc->sc_ioh)) { 103 printf("%s: unable to map device\n", sc->sc_dev.dv_xname); 104 return; 105 } 106 107 memset(&sc->sc_todr, 0, sizeof(struct todr_chip_handle)); 108 sc->sc_todr.cookie = sc; 109 sc->sc_todr.todr_gettime = plrtc_gettime; 110 sc->sc_todr.todr_settime = plrtc_settime; 111 112 todr_attach( &sc->sc_todr ); 113 114 printf("\n"); 115 } 116