1 /* $NetBSD: pl030_rtc.c,v 1.10 2009/12/12 14:44:09 tsutsui 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 1.10 2009/12/12 14:44:09 tsutsui 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 bus_space_tag_t sc_iot; 56 bus_space_handle_t sc_ioh; 57 struct todr_chip_handle sc_todr; 58 }; 59 60 static int plrtc_probe (device_t, cfdata_t, void *); 61 static void plrtc_attach (device_t, device_t, void *); 62 63 CFATTACH_DECL_NEW(plrtc, sizeof(struct plrtc_softc), 64 plrtc_probe, plrtc_attach, NULL, NULL); 65 66 static int 67 plrtc_gettime(todr_chip_handle_t todr, struct timeval *tv) 68 { 69 struct plrtc_softc *sc; 70 71 sc = (struct plrtc_softc *)todr->cookie; 72 tv->tv_sec = bus_space_read_4(sc->sc_iot, sc->sc_ioh, IFPGA_RTC_DR); 73 /* initialize tv_usec? */ 74 return 0; 75 } 76 77 static int 78 plrtc_settime(todr_chip_handle_t todr, struct timeval *tv) 79 { 80 struct plrtc_softc *sc; 81 82 sc = (struct plrtc_softc *)todr->cookie; 83 bus_space_write_4(sc->sc_iot, sc->sc_ioh, IFPGA_RTC_LR, tv->tv_sec); 84 return 0; 85 } 86 87 static int 88 plrtc_probe(device_t parent, cfdata_t cf, void *aux) 89 { 90 return 1; 91 } 92 93 static void 94 plrtc_attach(device_t parent, device_t self, void *aux) 95 { 96 struct ifpga_attach_args *ifa = aux; 97 struct plrtc_softc *sc = device_private(self); 98 99 sc->sc_iot = ifa->ifa_iot; 100 if (bus_space_map(ifa->ifa_iot, ifa->ifa_addr, PL030_RTC_SIZE, 0, 101 &sc->sc_ioh)) { 102 printf("%s: unable to map device\n", device_xname(self)); 103 return; 104 } 105 106 memset(&sc->sc_todr, 0, sizeof(struct todr_chip_handle)); 107 sc->sc_todr.cookie = sc; 108 sc->sc_todr.todr_gettime = plrtc_gettime; 109 sc->sc_todr.todr_settime = plrtc_settime; 110 111 todr_attach( &sc->sc_todr ); 112 113 printf("\n"); 114 } 115