pps_ppbus.c revision 1.13.2.1
1 /* $NetBSD: pps_ppbus.c,v 1.13.2.1 2009/05/04 08:13:15 yamt 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 1.13.2.1 2009/05/04 08:13:15 yamt 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 device_t ppbus; 51 int busy; 52 struct pps_state pps_state; /* pps state */ 53 }; 54 55 static int pps_probe(device_t, cfdata_t, void *); 56 static void pps_attach(device_t, device_t, void *); 57 CFATTACH_DECL_NEW(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(device_t parent, cfdata_t 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(device_t parent, device_t self, void *aux) 85 { 86 struct pps_softc *sc = device_private(self); 87 88 sc->ppbus = parent; 89 sc->pps_dev.sc_dev = self; 90 91 printf("\n"); 92 } 93 94 static int 95 ppsopen(dev_t dev, int flags, int fmt, struct lwp *l) 96 { 97 struct pps_softc *sc; 98 int res, weg = 0; 99 100 sc = device_lookup_private(&pps_cd, minor(dev)); 101 if (!sc) 102 return (ENXIO); 103 104 if (sc->busy) 105 return (0); 106 107 if (ppbus_request_bus(sc->ppbus, sc->pps_dev.sc_dev, 108 PPBUS_WAIT|PPBUS_INTR, 0)) 109 return (EINTR); 110 111 ppbus_write_ivar(sc->ppbus, PPBUS_IVAR_IEEE, &weg); 112 113 /* attach the interrupt handler */ 114 /* XXX priority should be set here */ 115 res = ppbus_add_handler(sc->ppbus, ppsintr, sc); 116 if (res) { 117 ppbus_release_bus(sc->ppbus, sc->pps_dev.sc_dev, 118 PPBUS_WAIT, 0); 119 return (res); 120 } 121 122 ppbus_set_mode(sc->ppbus, PPBUS_PS2, 0); 123 ppbus_wctr(sc->ppbus, IRQENABLE | PCD | nINIT | SELECTIN); 124 125 mutex_spin_enter(&timecounter_lock); 126 memset((void *)&sc->pps_state, 0, sizeof(sc->pps_state)); 127 sc->pps_state.ppscap = PPS_CAPTUREASSERT; 128 pps_init(&sc->pps_state); 129 mutex_spin_exit(&timecounter_lock); 130 131 sc->busy = 1; 132 133 return (0); 134 } 135 136 static int 137 ppsclose(dev_t dev, int flags, int fmt, struct lwp *l) 138 { 139 struct pps_softc *sc = device_lookup_private(&pps_cd, minor(dev)); 140 device_t ppbus = sc->ppbus; 141 142 sc->busy = 0; 143 mutex_spin_enter(&timecounter_lock); 144 sc->pps_state.ppsparam.mode = 0; 145 mutex_spin_exit(&timecounter_lock); 146 147 ppbus_wdtr(ppbus, 0); 148 ppbus_wctr(ppbus, 0); 149 150 ppbus_remove_handler(ppbus, ppsintr); 151 ppbus_set_mode(ppbus, PPBUS_COMPATIBLE, 0); 152 ppbus_release_bus(ppbus, sc->pps_dev.sc_dev, PPBUS_WAIT, 0); 153 return (0); 154 } 155 156 static void 157 ppsintr(void *arg) 158 { 159 struct pps_softc *sc = arg; 160 device_t ppbus = sc->ppbus; 161 162 mutex_spin_enter(&timecounter_lock); 163 pps_capture(&sc->pps_state); 164 if (!(ppbus_rstr(ppbus) & nACK)) { 165 mutex_spin_exit(&timecounter_lock); 166 return; 167 } 168 if (sc->pps_state.ppsparam.mode & PPS_ECHOASSERT) 169 ppbus_wctr(ppbus, IRQENABLE | AUTOFEED); 170 pps_event(&sc->pps_state, PPS_CAPTUREASSERT); 171 if (sc->pps_state.ppsparam.mode & PPS_ECHOASSERT) 172 ppbus_wctr(ppbus, IRQENABLE); 173 mutex_spin_exit(&timecounter_lock); 174 } 175 176 static int 177 ppsioctl(dev_t dev, u_long cmd, void *data, int flags, struct lwp *l) 178 { 179 struct pps_softc *sc = device_lookup_private(&pps_cd, minor(dev)); 180 int error = 0; 181 182 switch (cmd) { 183 case PPS_IOC_CREATE: 184 case PPS_IOC_DESTROY: 185 case PPS_IOC_GETPARAMS: 186 case PPS_IOC_SETPARAMS: 187 case PPS_IOC_GETCAP: 188 case PPS_IOC_FETCH: 189 #ifdef PPS_SYNC 190 case PPS_IOC_KCBIND: 191 #endif 192 mutex_spin_enter(&timecounter_lock); 193 error = pps_ioctl(cmd, data, &sc->pps_state); 194 mutex_spin_exit(&timecounter_lock); 195 break; 196 197 default: 198 error = EPASSTHROUGH; 199 break; 200 } 201 return (error); 202 } 203
Indexes created Fri Oct 17 23:09:53 GMT 2025