1 /* $NetBSD: aurtc.c,v 1.16 2025/09/07 21:45:14 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 2006 Itronix Inc. 5 * All rights reserved. 6 * 7 * Written by Garrett D'Amore for Itronix Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. The name of Itronix Inc. may not be used to endorse 18 * or promote products derived from this software without specific 19 * prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ITRONIX INC. BE LIABLE FOR ANY 25 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 26 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 27 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 28 * ON ANY THEORY OF LIABILITY, WHETHER IN 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 * POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 /* 35 * Copyright 2002 Wasabi Systems, Inc. 36 * All rights reserved. 37 * 38 * Written by Simon Burge for Wasabi Systems, Inc. 39 * 40 * Redistribution and use in source and binary forms, with or without 41 * modification, are permitted provided that the following conditions 42 * are met: 43 * 1. Redistributions of source code must retain the above copyright 44 * notice, this list of conditions and the following disclaimer. 45 * 2. Redistributions in binary form must reproduce the above copyright 46 * notice, this list of conditions and the following disclaimer in the 47 * documentation and/or other materials provided with the distribution. 48 * 3. All advertising materials mentioning features or use of this software 49 * must display the following acknowledgement: 50 * This product includes software developed for the NetBSD Project by 51 * Wasabi Systems, Inc. 52 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 53 * or promote products derived from this software without specific prior 54 * written permission. 55 * 56 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 57 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 58 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 59 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 60 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 61 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 62 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 63 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 64 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 65 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 66 * POSSIBILITY OF SUCH DAMAGE. 67 */ 68 69 70 #include <sys/cdefs.h> 71 __KERNEL_RCSID(0, "$NetBSD: aurtc.c,v 1.16 2025/09/07 21:45:14 thorpej Exp $"); 72 73 #include <sys/param.h> 74 #include <sys/systm.h> 75 #include <sys/errno.h> 76 #include <sys/device.h> 77 #include <sys/proc.h> 78 79 #include <dev/clock_subr.h> 80 81 #include <sys/bus.h> 82 83 #include <mips/alchemy/include/aureg.h> 84 #include <mips/alchemy/include/auvar.h> 85 #include <mips/alchemy/include/aubusvar.h> 86 87 #define REGVAL(x) (*(volatile uint32_t *)(MIPS_PHYS_TO_KSEG1(PC_BASE + (x)))) 88 #define GETREG(x) (REGVAL(x)) 89 #define PUTREG(x,v) (REGVAL(x) = (v)) 90 91 struct aurtc_softc { 92 device_t sc_dev; 93 struct todr_chip_handle sc_tch; 94 void *sc_shutdownhook; 95 }; 96 97 static int aurtc_match(device_t, struct cfdata *, void *); 98 static void aurtc_attach(device_t, device_t, void *); 99 static int aurtc_gettime(todr_chip_handle_t, struct timeval *); 100 static int aurtc_settime(todr_chip_handle_t, struct timeval *); 101 static void aurtc_shutdown(void *); 102 103 CFATTACH_DECL_NEW(aurtc, sizeof (struct aurtc_softc), 104 aurtc_match, aurtc_attach, NULL, NULL); 105 106 int 107 aurtc_match(device_t parent, struct cfdata *match, void *aux) 108 { 109 struct aubus_attach_args *aa = aux; 110 111 if (strcmp(aa->aa_name, match->cf_name) == 0) 112 return (1); 113 114 return (0); 115 } 116 117 void 118 aurtc_attach(device_t parent, device_t self, void *aux) 119 { 120 struct aurtc_softc *sc = device_private(self); 121 122 printf(": Au1X00 programmable clock\n"); 123 124 sc->sc_dev = self; 125 sc->sc_tch.todr_dev = self; 126 sc->sc_tch.todr_gettime = aurtc_gettime; 127 sc->sc_tch.todr_settime = aurtc_settime; 128 129 sc->sc_shutdownhook = shutdownhook_establish(aurtc_shutdown, NULL); 130 131 todr_attach(&sc->sc_tch); 132 } 133 134 /* 135 * Note that our RTC only has second resolution. 136 */ 137 138 int 139 aurtc_gettime(todr_chip_handle_t tch, struct timeval *tv) 140 { 141 int s; 142 143 s = splclock(); 144 tv->tv_sec = GETREG(PC_COUNTER_READ_0); 145 splx(s); 146 return 0; 147 } 148 149 int 150 aurtc_settime(todr_chip_handle_t tch, struct timeval *tvp) 151 { 152 int s; 153 struct timeval tv; 154 155 s = splclock(); 156 tv = *tvp; 157 splx(s); 158 159 /* wait for the clock register to be idle */ 160 while (GETREG(PC_COUNTER_CONTROL) & CC_C0S) { 161 continue; 162 } 163 164 PUTREG(PC_COUNTER_WRITE0, tv.tv_sec); 165 166 /* 167 * It could take a second or two for the clock change to take effect. 168 * We don't want to make settimeofday() take that long, so we don't 169 * wait here, but instead wait in flush. This can have a bad effect 170 * for settimeofday() calls with a short window between them. 171 */ 172 return 0; 173 } 174 175 void 176 aurtc_shutdown(void *arg) 177 { 178 179 /* wait for the clock register to be idle */ 180 while (GETREG(PC_COUNTER_CONTROL) & CC_C0S) { 181 continue; 182 } 183 } 184
Indexes created Sat Sep 20 22:09:52 GMT 2025