pl030_rtc.c revision 1.2.2.2
1 1.2.2.2 thorpej /* $NetBSD: pl030_rtc.c,v 1.2.2.2 2002/01/10 19:42:10 thorpej Exp $ */ 2 1.2.2.2 thorpej 3 1.2.2.2 thorpej /* 4 1.2.2.2 thorpej * Copyright (c) 2001 ARM Ltd 5 1.2.2.2 thorpej * All rights reserved. 6 1.2.2.2 thorpej * 7 1.2.2.2 thorpej * Redistribution and use in source and binary forms, with or without 8 1.2.2.2 thorpej * modification, are permitted provided that the following conditions 9 1.2.2.2 thorpej * are met: 10 1.2.2.2 thorpej * 1. Redistributions of source code must retain the above copyright 11 1.2.2.2 thorpej * notice, this list of conditions and the following disclaimer. 12 1.2.2.2 thorpej * 2. Redistributions in binary form must reproduce the above copyright 13 1.2.2.2 thorpej * notice, this list of conditions and the following disclaimer in the 14 1.2.2.2 thorpej * documentation and/or other materials provided with the distribution. 15 1.2.2.2 thorpej * 3. The name of the company may not be used to endorse or promote 16 1.2.2.2 thorpej * products derived from this software without specific prior written 17 1.2.2.2 thorpej * permission. 18 1.2.2.2 thorpej * 19 1.2.2.2 thorpej * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 20 1.2.2.2 thorpej * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 21 1.2.2.2 thorpej * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 1.2.2.2 thorpej * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 23 1.2.2.2 thorpej * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 24 1.2.2.2 thorpej * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 25 1.2.2.2 thorpej * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 1.2.2.2 thorpej * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 1.2.2.2 thorpej * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 1.2.2.2 thorpej * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 1.2.2.2 thorpej * SUCH DAMAGE. 30 1.2.2.2 thorpej */ 31 1.2.2.2 thorpej 32 1.2.2.2 thorpej /* Include header files */ 33 1.2.2.2 thorpej 34 1.2.2.2 thorpej #include <sys/types.h> 35 1.2.2.2 thorpej #include <sys/param.h> 36 1.2.2.2 thorpej #include <sys/systm.h> 37 1.2.2.2 thorpej #include <sys/kernel.h> 38 1.2.2.2 thorpej #include <sys/time.h> 39 1.2.2.2 thorpej #include <sys/device.h> 40 1.2.2.2 thorpej 41 1.2.2.2 thorpej #include <arm/cpufunc.h> 42 1.2.2.2 thorpej #include <machine/intr.h> 43 1.2.2.2 thorpej #include <evbarm/ifpga/ifpgavar.h> 44 1.2.2.2 thorpej #include <evbarm/ifpga/ifpgamem.h> 45 1.2.2.2 thorpej #include <evbarm/ifpga/ifpgareg.h> 46 1.2.2.2 thorpej 47 1.2.2.2 thorpej #define PL030_RTC_SIZE 0x14 48 1.2.2.2 thorpej 49 1.2.2.2 thorpej struct plrtc_softc { 50 1.2.2.2 thorpej struct device sc_dev; 51 1.2.2.2 thorpej bus_space_tag_t sc_iot; 52 1.2.2.2 thorpej bus_space_handle_t sc_ioh; 53 1.2.2.2 thorpej }; 54 1.2.2.2 thorpej 55 1.2.2.2 thorpej static int plrtc_probe (struct device *, struct cfdata *, void *); 56 1.2.2.2 thorpej static void plrtc_attach (struct device *, struct device *, void *); 57 1.2.2.2 thorpej 58 1.2.2.2 thorpej struct cfattach plrtc_ca = { 59 1.2.2.2 thorpej sizeof(struct plrtc_softc), plrtc_probe, plrtc_attach 60 1.2.2.2 thorpej }; 61 1.2.2.2 thorpej 62 1.2.2.2 thorpej /* Remember our handle, since it isn't passed in by inittodr and 63 1.2.2.2 thorpej resettodr. */ 64 1.2.2.2 thorpej static struct plrtc_softc *plrtc_sc; 65 1.2.2.2 thorpej 66 1.2.2.2 thorpej static int timeset = 0; 67 1.2.2.2 thorpej 68 1.2.2.2 thorpej static int 69 1.2.2.2 thorpej plrtc_probe(struct device *parent, struct cfdata *cf, void *aux) 70 1.2.2.2 thorpej { 71 1.2.2.2 thorpej if (strcmp(cf->cf_driver->cd_name, "plrtc") == 0) 72 1.2.2.2 thorpej return 1; 73 1.2.2.2 thorpej return 0; 74 1.2.2.2 thorpej } 75 1.2.2.2 thorpej 76 1.2.2.2 thorpej static void 77 1.2.2.2 thorpej plrtc_attach(struct device *parent, struct device *self, void *aux) 78 1.2.2.2 thorpej { 79 1.2.2.2 thorpej struct ifpga_attach_args *ifa = aux; 80 1.2.2.2 thorpej struct plrtc_softc *sc = (struct plrtc_softc *)self; 81 1.2.2.2 thorpej 82 1.2.2.2 thorpej sc->sc_iot = ifa->ifa_iot; 83 1.2.2.2 thorpej if (bus_space_map(ifa->ifa_iot, ifa->ifa_addr, PL030_RTC_SIZE, 0, 84 1.2.2.2 thorpej &sc->sc_ioh)) { 85 1.2.2.2 thorpej printf("%s: unable to map device\n", sc->sc_dev.dv_xname); 86 1.2.2.2 thorpej return; 87 1.2.2.2 thorpej } 88 1.2.2.2 thorpej 89 1.2.2.2 thorpej plrtc_sc = sc; 90 1.2.2.2 thorpej 91 1.2.2.2 thorpej printf("\n"); 92 1.2.2.2 thorpej } 93 1.2.2.2 thorpej 94 1.2.2.2 thorpej void 95 1.2.2.2 thorpej inittodr(time_t base) 96 1.2.2.2 thorpej { 97 1.2.2.2 thorpej time_t rtc_time; 98 1.2.2.2 thorpej struct plrtc_softc *sc = plrtc_sc; 99 1.2.2.2 thorpej 100 1.2.2.2 thorpej if (sc == NULL) 101 1.2.2.2 thorpej panic("RTC not attached"); 102 1.2.2.2 thorpej 103 1.2.2.2 thorpej /* Default to the suggested time, but replace that with one from the 104 1.2.2.2 thorpej RTC if it seems more sensible. */ 105 1.2.2.2 thorpej rtc_time = bus_space_read_4(sc->sc_iot, sc->sc_ioh, IFPGA_RTC_DR); 106 1.2.2.2 thorpej 107 1.2.2.2 thorpej time.tv_usec = 0; 108 1.2.2.2 thorpej time.tv_sec = rtc_time; 109 1.2.2.2 thorpej 110 1.2.2.2 thorpej timeset = 1; 111 1.2.2.2 thorpej 112 1.2.2.2 thorpej if (base > rtc_time) { 113 1.2.2.2 thorpej printf("inittodr: rtc value suspect, ignoring it.\n"); 114 1.2.2.2 thorpej time.tv_usec = 0; 115 1.2.2.2 thorpej time.tv_sec = base; 116 1.2.2.2 thorpej return; 117 1.2.2.2 thorpej } 118 1.2.2.2 thorpej } 119 1.2.2.2 thorpej 120 1.2.2.2 thorpej void 121 1.2.2.2 thorpej resettodr() 122 1.2.2.2 thorpej { 123 1.2.2.2 thorpej struct plrtc_softc *sc = plrtc_sc; 124 1.2.2.2 thorpej 125 1.2.2.2 thorpej /* The time hasn't been set yet, so avoid writing a dubious value 126 1.2.2.2 thorpej to the RTC. */ 127 1.2.2.2 thorpej if (!timeset) 128 1.2.2.2 thorpej return; 129 1.2.2.2 thorpej 130 1.2.2.2 thorpej bus_space_write_4(sc->sc_iot, sc->sc_ioh, IFPGA_RTC_LR, time.tv_sec); 131 1.2.2.2 thorpej } 132
Indexes created Thu Oct 23 18:09:57 GMT 2025