pps_ppbus.c revision 1.4.12.1
1 /* $NetBSD: pps_ppbus.c,v 1.4.12.1 2006/03/31 09:45:24 tron Exp $ */ 2 3 /* 4 * Copyright (c) 2004 5 * Matthias Drochner. 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: pps_ppbus.c,v 1.4.12.1 2006/03/31 09:45:24 tron Exp $"); 31 32 #include "opt_ntp.h" 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/conf.h> 37 #include <sys/proc.h> 38 #include <sys/ioctl.h> 39 #include <sys/timepps.h> 40 41 #include <dev/ppbus/ppbus_base.h> 42 #include <dev/ppbus/ppbus_device.h> 43 #include <dev/ppbus/ppbus_io.h> 44 #include <dev/ppbus/ppbus_var.h> 45 46 struct pps_softc { 47 struct ppbus_device_softc pps_dev; 48 struct device *ppbus; 49 int busy; 50 pps_info_t ppsinfo; 51 pps_params_t ppsparam; 52 #ifdef PPS_SYNC 53 int hardpps; 54 #endif 55 }; 56 57 static int pps_probe(struct device *, struct cfdata *, void *); 58 static void pps_attach(struct device *, struct device *, void *); 59 CFATTACH_DECL(pps, sizeof(struct pps_softc), pps_probe, pps_attach, 60 NULL, NULL); 61 extern struct cfdriver pps_cd; 62 63 static dev_type_open(ppsopen); 64 static dev_type_close(ppsclose); 65 static dev_type_ioctl(ppsioctl); 66 const struct cdevsw pps_cdevsw = { 67 ppsopen, ppsclose, noread, nowrite, ppsioctl, 68 nostop, notty, nopoll, nommap, nokqfilter 69 }; 70 71 static void ppsintr(void *arg); 72 73 static int ppscap = PPS_TSFMT_TSPEC | PPS_CAPTUREASSERT | PPS_OFFSETASSERT; 74 75 static int 76 pps_probe(struct device *parent, struct cfdata *match, void *aux) 77 { 78 struct ppbus_attach_args *args = aux; 79 80 /* we need an interrupt */ 81 if (!(args->capabilities & PPBUS_HAS_INTR)) 82 return 0; 83 84 return 1; 85 } 86 87 static void 88 pps_attach(struct device *parent, struct device *self, void *aux) 89 { 90 struct pps_softc *sc = device_private(self); 91 92 sc->ppbus = parent; 93 94 printf("\n"); 95 } 96 97 static int 98 ppsopen(dev_t dev, int flags, int fmt, struct lwp *l) 99 { 100 struct pps_softc *sc; 101 int res; 102 103 sc = device_lookup(&pps_cd, minor(dev)); 104 if (!sc) 105 return (ENXIO); 106 107 if (sc->busy) 108 return (0); 109 110 if (ppbus_request_bus(sc->ppbus, &sc->pps_dev.sc_dev, 111 PPBUS_WAIT|PPBUS_INTR, 0)) 112 return (EINTR); 113 114 /* attach the interrupt handler */ 115 /* XXX priority should be set here */ 116 res = ppbus_add_handler(sc->ppbus, ppsintr, sc); 117 if (res) { 118 ppbus_release_bus(sc->ppbus, &sc->pps_dev.sc_dev, 119 PPBUS_WAIT, 0); 120 return (res); 121 } 122 123 ppbus_set_mode(sc->ppbus, PPBUS_PS2, 0); 124 ppbus_wctr(sc->ppbus, IRQENABLE | PCD | nINIT | SELECTIN); 125 126 sc->busy = 1; 127 return (0); 128 } 129 130 static int 131 ppsclose(dev_t dev, int flags, int fmt, struct lwp *l) 132 { 133 struct pps_softc *sc = device_lookup(&pps_cd, minor(dev)); 134 struct device *ppbus = sc->ppbus; 135 136 sc->ppsparam.mode = 0; 137 sc->busy = 0; 138 #ifdef PPS_SYNC 139 sc->hardpps = 0; 140 #endif 141 ppbus_wdtr(ppbus, 0); 142 ppbus_wctr(ppbus, 0); 143 144 ppbus_remove_handler(ppbus, ppsintr); 145 ppbus_set_mode(ppbus, PPBUS_COMPATIBLE, 0); 146 ppbus_release_bus(ppbus, &sc->pps_dev.sc_dev, PPBUS_WAIT, 0); 147 return (0); 148 } 149 150 static void 151 ppsintr(void *arg) 152 { 153 struct pps_softc *sc = arg; 154 struct device *ppbus = sc->ppbus; 155 struct timeval tv; 156 157 if (!(ppbus_rstr(ppbus) & nACK)) 158 return; 159 160 microtime(&tv); 161 TIMEVAL_TO_TIMESPEC(&tv, &sc->ppsinfo.assert_timestamp); 162 if (sc->ppsparam.mode & PPS_OFFSETASSERT) { 163 timespecadd(&sc->ppsinfo.assert_timestamp, 164 &sc->ppsparam.assert_offset, 165 &sc->ppsinfo.assert_timestamp); 166 } 167 #ifdef PPS_SYNC 168 if (sc->hardpps) 169 hardpps(&tv, tv.tv_usec); 170 #endif 171 sc->ppsinfo.assert_sequence++; 172 sc->ppsinfo.current_mode = sc->ppsparam.mode; 173 } 174 175 static int 176 ppsioctl(dev_t dev, u_long cmd, caddr_t data, int flags, struct lwp *l) 177 { 178 struct pps_softc *sc = device_lookup(&pps_cd, minor(dev)); 179 int error = 0; 180 181 switch (cmd) { 182 case PPS_IOC_CREATE: 183 break; 184 185 case PPS_IOC_DESTROY: 186 break; 187 188 case PPS_IOC_GETPARAMS: { 189 pps_params_t *pp; 190 pp = (pps_params_t *)data; 191 *pp = sc->ppsparam; 192 break; 193 } 194 195 case PPS_IOC_SETPARAMS: { 196 pps_params_t *pp; 197 pp = (pps_params_t *)data; 198 if (pp->mode & ~(ppscap)) { 199 error = EINVAL; 200 break; 201 } 202 sc->ppsparam = *pp; 203 break; 204 } 205 206 case PPS_IOC_GETCAP: 207 *(int*)data = ppscap; 208 break; 209 210 case PPS_IOC_FETCH: { 211 pps_info_t *pi; 212 pi = (pps_info_t *)data; 213 *pi = sc->ppsinfo; 214 break; 215 } 216 217 #ifdef PPS_SYNC 218 case PPS_IOC_KCBIND: 219 if (*(int *)data & PPS_CAPTUREASSERT) 220 sc->hardpps = 1; 221 else 222 sc->hardpps = 0; 223 break; 224 #endif 225 226 default: 227 error = EPASSTHROUGH; 228 break; 229 } 230 return (error); 231 } 232
Indexes created Wed Oct 15 16:09:53 GMT 2025