pps_ppbus.c revision 1.9.16.1
1 /* pps_ppbus.c,v 1.9 2007/03/04 06:02:28 christos 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, "pps_ppbus.c,v 1.9 2007/03/04 06:02:28 christos 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 struct pps_state pps_state; /* pps state */ 53 }; 54 55 static int pps_probe(struct device *, struct cfdata *, void *); 56 static void pps_attach(struct device *, struct device *, void *); 57 CFATTACH_DECL(pps, sizeof(struct pps_softc), pps_probe, pps_attach, 58 NULL, NULL); 59 extern struct cfdriver pps_cd; 60 61 static dev_type_open(ppsopen); 62 static dev_type_close(ppsclose); 63 static dev_type_ioctl(ppsioctl); 64 const struct cdevsw pps_cdevsw = { 65 ppsopen, ppsclose, noread, nowrite, ppsioctl, 66 nostop, notty, nopoll, nommap, nokqfilter, D_OTHER 67 }; 68 69 static void ppsintr(void *arg); 70 71 static int 72 pps_probe(struct device *parent, struct cfdata *match, void *aux) 73 { 74 struct ppbus_attach_args *args = aux; 75 76 /* we need an interrupt */ 77 if (!(args->capabilities & PPBUS_HAS_INTR)) 78 return 0; 79 80 return 1; 81 } 82 83 static void 84 pps_attach(struct device *parent, struct device *self, void *aux) 85 { 86 struct pps_softc *sc = device_private(self); 87 88 sc->ppbus = parent; 89 90 printf("\n"); 91 } 92 93 static int 94 ppsopen(dev_t dev, int flags, int fmt, struct lwp *l) 95 { 96 struct pps_softc *sc; 97 int res, weg = 0; 98 99 sc = device_lookup(&pps_cd, minor(dev)); 100 if (!sc) 101 return (ENXIO); 102 103 if (sc->busy) 104 return (0); 105 106 if (ppbus_request_bus(sc->ppbus, &sc->pps_dev.sc_dev, 107 PPBUS_WAIT|PPBUS_INTR, 0)) 108 return (EINTR); 109 110 ppbus_write_ivar(sc->ppbus, PPBUS_IVAR_IEEE, &weg); 111 112 /* attach the interrupt handler */ 113 /* XXX priority should be set here */ 114 res = ppbus_add_handler(sc->ppbus, ppsintr, sc); 115 if (res) { 116 ppbus_release_bus(sc->ppbus, &sc->pps_dev.sc_dev, 117 PPBUS_WAIT, 0); 118 return (res); 119 } 120 121 ppbus_set_mode(sc->ppbus, PPBUS_PS2, 0); 122 ppbus_wctr(sc->ppbus, IRQENABLE | PCD | nINIT | SELECTIN); 123 124 memset((void *)&sc->pps_state, 0, sizeof(sc->pps_state)); 125 sc->pps_state.ppscap = PPS_CAPTUREASSERT; 126 pps_init(&sc->pps_state); 127 128 sc->busy = 1; 129 return (0); 130 } 131 132 static int 133 ppsclose(dev_t dev, int flags, int fmt, struct lwp *l) 134 { 135 struct pps_softc *sc = device_lookup(&pps_cd, minor(dev)); 136 struct device *ppbus = sc->ppbus; 137 138 sc->busy = 0; 139 sc->pps_state.ppsparam.mode = 0; 140 141 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; 155 156 pps_capture(&sc->pps_state); 157 158 if (!(ppbus_rstr(ppbus) & nACK)) 159 return; 160 161 if (sc->pps_state.ppsparam.mode & PPS_ECHOASSERT) 162 ppbus_wctr(ppbus, IRQENABLE | AUTOFEED); 163 164 pps_event(&sc->pps_state, PPS_CAPTUREASSERT); 165 166 if (sc->pps_state.ppsparam.mode & PPS_ECHOASSERT) 167 ppbus_wctr(ppbus, IRQENABLE); 168 } 169 170 static int 171 ppsioctl(dev_t dev, u_long cmd, void *data, int flags, struct lwp *l) 172 { 173 struct pps_softc *sc = device_lookup(&pps_cd, minor(dev)); 174 int error = 0; 175 176 switch (cmd) { 177 case PPS_IOC_CREATE: 178 case PPS_IOC_DESTROY: 179 case PPS_IOC_GETPARAMS: 180 case PPS_IOC_SETPARAMS: 181 case PPS_IOC_GETCAP: 182 case PPS_IOC_FETCH: 183 #ifdef PPS_SYNC 184 case PPS_IOC_KCBIND: 185 #endif 186 error = pps_ioctl(cmd, data, &sc->pps_state); 187 break; 188 189 default: 190 error = EPASSTHROUGH; 191 break; 192 } 193 return (error); 194 } 195
Indexes created Wed Oct 15 16:09:53 GMT 2025