pl031.c revision 1.1.2.2
1 1.1.2.2 snj /* $NetBSD: pl031.c,v 1.1.2.2 2017/06/10 05:57:08 snj Exp $ */ 2 1.1.2.2 snj 3 1.1.2.2 snj /*- 4 1.1.2.2 snj * Copyright (c) 2017 Jared McNeill <jmcneill (at) invisible.ca> 5 1.1.2.2 snj * All rights reserved. 6 1.1.2.2 snj * 7 1.1.2.2 snj * Redistribution and use in source and binary forms, with or without 8 1.1.2.2 snj * modification, are permitted provided that the following conditions 9 1.1.2.2 snj * are met: 10 1.1.2.2 snj * 1. Redistributions of source code must retain the above copyright 11 1.1.2.2 snj * notice, this list of conditions and the following disclaimer. 12 1.1.2.2 snj * 2. Redistributions in binary form must reproduce the above copyright 13 1.1.2.2 snj * notice, this list of conditions and the following disclaimer in the 14 1.1.2.2 snj * documentation and/or other materials provided with the distribution. 15 1.1.2.2 snj * 16 1.1.2.2 snj * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 1.1.2.2 snj * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 1.1.2.2 snj * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 1.1.2.2 snj * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 1.1.2.2 snj * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 1.1.2.2 snj * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 1.1.2.2 snj * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 1.1.2.2 snj * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 1.1.2.2 snj * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 1.1.2.2 snj * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 1.1.2.2 snj * SUCH DAMAGE. 27 1.1.2.2 snj */ 28 1.1.2.2 snj 29 1.1.2.2 snj #include <sys/cdefs.h> 30 1.1.2.2 snj __KERNEL_RCSID(0, "$NetBSD: pl031.c,v 1.1.2.2 2017/06/10 05:57:08 snj Exp $"); 31 1.1.2.2 snj 32 1.1.2.2 snj #include <sys/param.h> 33 1.1.2.2 snj #include <sys/systm.h> 34 1.1.2.2 snj #include <sys/device.h> 35 1.1.2.2 snj #include <sys/kmem.h> 36 1.1.2.2 snj #include <sys/bus.h> 37 1.1.2.2 snj 38 1.1.2.2 snj #include <dev/clock_subr.h> 39 1.1.2.2 snj 40 1.1.2.2 snj #include <dev/ic/pl031var.h> 41 1.1.2.2 snj 42 1.1.2.2 snj #define RTCDR 0x000 43 1.1.2.2 snj #define RTCLR 0x008 44 1.1.2.2 snj #define RTCCR 0x00c 45 1.1.2.2 snj #define RTCCR_START __BIT(0) 46 1.1.2.2 snj 47 1.1.2.2 snj #define RTC_READ(sc, reg) \ 48 1.1.2.2 snj bus_space_read_4((sc)->sc_bst, (sc)->sc_bsh, (reg)) 49 1.1.2.2 snj #define RTC_WRITE(sc, reg, val) \ 50 1.1.2.2 snj bus_space_write_4((sc)->sc_bst, (sc)->sc_bsh, (reg), (val)) 51 1.1.2.2 snj 52 1.1.2.2 snj static int 53 1.1.2.2 snj plrtc_gettime(todr_chip_handle_t tch, struct timeval *tv) 54 1.1.2.2 snj { 55 1.1.2.2 snj struct plrtc_softc * const sc = tch->cookie; 56 1.1.2.2 snj 57 1.1.2.2 snj tv->tv_sec = RTC_READ(sc, RTCDR); 58 1.1.2.2 snj tv->tv_usec = 0; 59 1.1.2.2 snj 60 1.1.2.2 snj return 0; 61 1.1.2.2 snj } 62 1.1.2.2 snj 63 1.1.2.2 snj static int 64 1.1.2.2 snj plrtc_settime(todr_chip_handle_t tch, struct timeval *tv) 65 1.1.2.2 snj { 66 1.1.2.2 snj struct plrtc_softc * const sc = tch->cookie; 67 1.1.2.2 snj 68 1.1.2.2 snj RTC_WRITE(sc, RTCLR, tv->tv_sec); 69 1.1.2.2 snj 70 1.1.2.2 snj return 0; 71 1.1.2.2 snj } 72 1.1.2.2 snj 73 1.1.2.2 snj void 74 1.1.2.2 snj plrtc_attach(struct plrtc_softc *sc) 75 1.1.2.2 snj { 76 1.1.2.2 snj aprint_naive("\n"); 77 1.1.2.2 snj aprint_normal(": RTC\n"); 78 1.1.2.2 snj 79 1.1.2.2 snj sc->sc_todr.todr_gettime = plrtc_gettime; 80 1.1.2.2 snj sc->sc_todr.todr_settime = plrtc_settime; 81 1.1.2.2 snj sc->sc_todr.cookie = sc; 82 1.1.2.2 snj 83 1.1.2.2 snj RTC_WRITE(sc, RTCCR, RTCCR_START); 84 1.1.2.2 snj } 85
Indexes created Tue Oct 21 12:09:54 GMT 2025