pps_ppbus.c revision 1.8.4.1
1 /* $NetBSD: pps_ppbus.c,v 1.8.4.1 2007/03/12 05:56:47 rmind Exp $ */ 2 3 /* 4 * ported to timecounters by Frank Kardel 2006 5 * 6 * Copyright (c) 2004 7 * Matthias Drochner. All rights reserved. 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 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #include <sys/cdefs.h> 32 __KERNEL_RCSID(0, "$NetBSD: pps_ppbus.c,v 1.8.4.1 2007/03/12 05:56:47 rmind Exp $"); 33 34 #include "opt_ntp.h" 35 36 #include <sys/param.h> 37 #include <sys/systm.h> 38 #include <sys/conf.h> 39 #include <sys/proc.h> 40 #include <sys/ioctl.h> 41 #include <sys/timepps.h> 42 43 #include <dev/ppbus/ppbus_base.h> 44 #include <dev/ppbus/ppbus_device.h> 45 #include <dev/ppbus/ppbus_io.h> 46 #include <dev/ppbus/ppbus_var.h> 47 48 struct pps_softc { 49 struct ppbus_device_softc pps_dev; 50 struct device *ppbus; 51 int busy; 52 #ifdef __HAVE_TIMECOUNTER 53 struct pps_state pps_state; /* pps state */ 54 #else /* !__HAVE_TIMECOUNTER */ 55 pps_info_t ppsinfo; 56 pps_params_t ppsparam; 57 #ifdef PPS_SYNC 58 int hardpps; 59 #endif 60 #endif /* !__HAVE_TIMECOUNTER */ 61 }; 62 63 static int pps_probe(struct device *, struct cfdata *, void *); 64 static void pps_attach(struct device *, struct device *, void *); 65 CFATTACH_DECL(pps, sizeof(struct pps_softc), pps_probe, pps_attach, 66 NULL, NULL); 67 extern struct cfdriver pps_cd; 68 69 static dev_type_open(ppsopen); 70 static dev_type_close(ppsclose); 71 static dev_type_ioctl(ppsioctl); 72 const struct cdevsw pps_cdevsw = { 73 ppsopen, ppsclose, noread, nowrite, ppsioctl, 74 nostop, notty, nopoll, nommap, nokqfilter, D_OTHER 75 }; 76 77 static void ppsintr(void *arg); 78 79 #ifndef __HAVE_TIMECOUNTER 80 static int ppscap = PPS_TSFMT_TSPEC | PPS_CAPTUREASSERT | PPS_OFFSETASSERT; 81 #endif 82 83 static int 84 pps_probe(struct device *parent, struct cfdata *match, void *aux) 85 { 86 struct ppbus_attach_args *args = aux; 87 88 /* we need an interrupt */ 89 if (!(args->capabilities & PPBUS_HAS_INTR)) 90 return 0; 91 92 return 1; 93 } 94 95 static void 96 pps_attach(struct device *parent, struct device *self, void *aux) 97 { 98 struct pps_softc *sc = device_private(self); 99 100 sc->ppbus = parent; 101 102 printf("\n"); 103 } 104 105 static int 106 ppsopen(dev_t dev, int flags, int fmt, struct lwp *l) 107 { 108 struct pps_softc *sc; 109 int res, weg = 0; 110 111 sc = device_lookup(&pps_cd, minor(dev)); 112 if (!sc) 113 return (ENXIO); 114 115 if (sc->busy) 116 return (0); 117 118 if (ppbus_request_bus(sc->ppbus, &sc->pps_dev.sc_dev, 119 PPBUS_WAIT|PPBUS_INTR, 0)) 120 return (EINTR); 121 122 ppbus_write_ivar(sc->ppbus, PPBUS_IVAR_IEEE, &weg); 123 124 /* attach the interrupt handler */ 125 /* XXX priority should be set here */ 126 res = ppbus_add_handler(sc->ppbus, ppsintr, sc); 127 if (res) { 128 ppbus_release_bus(sc->ppbus, &sc->pps_dev.sc_dev, 129 PPBUS_WAIT, 0); 130 return (res); 131 } 132 133 ppbus_set_mode(sc->ppbus, PPBUS_PS2, 0); 134 ppbus_wctr(sc->ppbus, IRQENABLE | PCD | nINIT | SELECTIN); 135 136 #ifdef __HAVE_TIMECOUNTER 137 memset((void *)&sc->pps_state, 0, sizeof(sc->pps_state)); 138 sc->pps_state.ppscap = PPS_CAPTUREASSERT; 139 pps_init(&sc->pps_state); 140 #endif /* __HAVE_TIMECOUNTER */ 141 142 sc->busy = 1; 143 return (0); 144 } 145 146 static int 147 ppsclose(dev_t dev, int flags, int fmt, struct lwp *l) 148 { 149 struct pps_softc *sc = device_lookup(&pps_cd, minor(dev)); 150 struct device *ppbus = sc->ppbus; 151 152 sc->busy = 0; 153 #ifdef __HAVE_TIMECOUNTER 154 sc->pps_state.ppsparam.mode = 0; 155 #else /* !__HAVE_TIMECOUNTER */ 156 sc->ppsparam.mode = 0; 157 #ifdef PPS_SYNC 158 sc->hardpps = 0; 159 #endif 160 #endif /* __HAVE_TIMECOUNTER */ 161 162 ppbus_wdtr(ppbus, 0); 163 ppbus_wctr(ppbus, 0); 164 165 ppbus_remove_handler(ppbus, ppsintr); 166 ppbus_set_mode(ppbus, PPBUS_COMPATIBLE, 0); 167 ppbus_release_bus(ppbus, &sc->pps_dev.sc_dev, PPBUS_WAIT, 0); 168 return (0); 169 } 170 171 static void 172 ppsintr(void *arg) 173 { 174 struct pps_softc *sc = arg; 175 struct device *ppbus = sc->ppbus; 176 #ifndef __HAVE_TIMECOUNTER 177 struct timeval tv; 178 179 #else /* __HAVE_TIMECOUNTER */ 180 pps_capture(&sc->pps_state); 181 #endif /* __HAVE_TIMECOUNTER */ 182 183 if (!(ppbus_rstr(ppbus) & nACK)) 184 return; 185 186 #ifdef __HAVE_TIMECOUNTER 187 if (sc->pps_state.ppsparam.mode & PPS_ECHOASSERT) 188 ppbus_wctr(ppbus, IRQENABLE | AUTOFEED); 189 190 pps_event(&sc->pps_state, PPS_CAPTUREASSERT); 191 192 if (sc->pps_state.ppsparam.mode & PPS_ECHOASSERT) 193 ppbus_wctr(ppbus, IRQENABLE); 194 #else /* !__HAVE_TIMECOUNTER */ 195 microtime(&tv); 196 TIMEVAL_TO_TIMESPEC(&tv, &sc->ppsinfo.assert_timestamp); 197 if (sc->ppsparam.mode & PPS_OFFSETASSERT) { 198 timespecadd(&sc->ppsinfo.assert_timestamp, 199 &sc->ppsparam.assert_offset, 200 &sc->ppsinfo.assert_timestamp); 201 } 202 #ifdef PPS_SYNC 203 if (sc->hardpps) 204 hardpps(&tv, tv.tv_usec); 205 #endif 206 sc->ppsinfo.assert_sequence++; 207 sc->ppsinfo.current_mode = sc->ppsparam.mode; 208 #endif /* !__HAVE_TIMECOUNTER */ 209 } 210 211 static int 212 ppsioctl(dev_t dev, u_long cmd, void *data, int flags, struct lwp *l) 213 { 214 struct pps_softc *sc = device_lookup(&pps_cd, minor(dev)); 215 int error = 0; 216 217 switch (cmd) { 218 #ifdef __HAVE_TIMECOUNTER 219 case PPS_IOC_CREATE: 220 case PPS_IOC_DESTROY: 221 case PPS_IOC_GETPARAMS: 222 case PPS_IOC_SETPARAMS: 223 case PPS_IOC_GETCAP: 224 case PPS_IOC_FETCH: 225 #ifdef PPS_SYNC 226 case PPS_IOC_KCBIND: 227 #endif 228 error = pps_ioctl(cmd, data, &sc->pps_state); 229 break; 230 #else /* !__HAVE_TIMECOUNTER */ 231 case PPS_IOC_CREATE: 232 break; 233 234 case PPS_IOC_DESTROY: 235 break; 236 237 case PPS_IOC_GETPARAMS: { 238 pps_params_t *pp; 239 pp = (pps_params_t *)data; 240 *pp = sc->ppsparam; 241 break; 242 } 243 244 case PPS_IOC_SETPARAMS: { 245 pps_params_t *pp; 246 pp = (pps_params_t *)data; 247 if (pp->mode & ~(ppscap)) { 248 error = EINVAL; 249 break; 250 } 251 sc->ppsparam = *pp; 252 break; 253 } 254 255 case PPS_IOC_GETCAP: 256 *(int*)data = ppscap; 257 break; 258 259 case PPS_IOC_FETCH: { 260 pps_info_t *pi; 261 pi = (pps_info_t *)data; 262 *pi = sc->ppsinfo; 263 break; 264 } 265 266 #ifdef PPS_SYNC 267 case PPS_IOC_KCBIND: 268 if (*(int *)data & PPS_CAPTUREASSERT) 269 sc->hardpps = 1; 270 else 271 sc->hardpps = 0; 272 break; 273 #endif 274 #endif /* !__HAVE_TIMECOUNTER */ 275 276 default: 277 error = EPASSTHROUGH; 278 break; 279 } 280 return (error); 281 } 282
Indexes created Wed Oct 15 16:09:53 GMT 2025