aurtc.c revision 1.10
1 /* $NetBSD: aurtc.c,v 1.10 2006/03/28 16:52:35 gdamore 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 1.10 2006/03/28 16:52:35 gdamore 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 <machine/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 struct device sc_dev; 93 struct todr_chip_handle sc_tch; 94 void *sc_shutdownhook; 95 }; 96 97 static int aurtc_match(struct device *, struct cfdata *, void *); 98 static void aurtc_attach(struct device *, struct device *, void *); 99 static int aurtc_gettime(todr_chip_handle_t, volatile struct timeval *); 100 static int aurtc_settime(todr_chip_handle_t, volatile struct timeval *); 101 static int aurtc_getcal(todr_chip_handle_t, int *); 102 static int aurtc_setcal(todr_chip_handle_t, int); 103 static void aurtc_shutdown(void *); 104 105 CFATTACH_DECL(aurtc, sizeof (struct aurtc_softc), 106 aurtc_match, aurtc_attach, NULL, NULL); 107 108 int 109 aurtc_match(struct device *parent, struct cfdata *match, void *aux) 110 { 111 struct aubus_attach_args *aa = aux; 112 113 if (strcmp(aa->aa_name, match->cf_name) == 0) 114 return (1); 115 116 return (0); 117 } 118 119 void 120 aurtc_attach(struct device *parent, struct device *self, void *aux) 121 { 122 struct aurtc_softc *sc = (struct aurtc_softc *)self; 123 124 printf(": Au1X00 programmable clock\n"); 125 126 sc->sc_tch.cookie = sc; 127 sc->sc_tch.bus_cookie = NULL; 128 sc->sc_tch.todr_gettime = aurtc_gettime; 129 sc->sc_tch.todr_settime = aurtc_settime; 130 sc->sc_tch.todr_getcal = aurtc_getcal; 131 sc->sc_tch.todr_setcal = aurtc_setcal; 132 sc->sc_tch.todr_setwen = NULL; 133 134 sc->sc_shutdownhook = shutdownhook_establish(aurtc_shutdown, NULL); 135 136 todr_attach(&sc->sc_tch); 137 } 138 139 /* 140 * Note that our RTC only has second resolution. 141 */ 142 143 int 144 aurtc_gettime(todr_chip_handle_t tch, volatile struct timeval *tv) 145 { 146 int s; 147 148 s = splclock(); 149 tv->tv_sec = GETREG(PC_COUNTER_READ_0); 150 splx(s); 151 return 0; 152 } 153 154 int 155 aurtc_settime(todr_chip_handle_t tch, volatile struct timeval *tvp) 156 { 157 int s; 158 struct timeval tv; 159 160 s = splclock(); 161 tv = *tvp; 162 splx(s); 163 164 /* wait for the clock register to be idle */ 165 while (GETREG(PC_COUNTER_CONTROL) & CC_C0S) { 166 continue; 167 } 168 169 PUTREG(PC_COUNTER_WRITE0, tv.tv_sec); 170 171 /* 172 * It could take a second or two for the clock change to take effect. 173 * We don't want to make settimeofday() take that long, so we don't 174 * wait here, but instead wait in flush. This can have a bad effect 175 * for settimeofday() calls with a short window between them. 176 */ 177 return 0; 178 } 179 180 int 181 aurtc_getcal(todr_chip_handle_t tch, int *vp) 182 { 183 184 return EOPNOTSUPP; 185 } 186 187 int 188 aurtc_setcal(todr_chip_handle_t tch, int v) 189 { 190 191 return EOPNOTSUPP; 192 } 193 194 void 195 aurtc_shutdown(void *arg) 196 { 197 198 /* wait for the clock register to be idle */ 199 while (GETREG(PC_COUNTER_CONTROL) & CC_C0S) { 200 continue; 201 } 202 } 203
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