cir.c revision 1.4
1 /* $NetBSD: cir.c,v 1.4 2002/09/27 15:37:22 provos Exp $ */ 2 3 /* 4 * Copyright (c) 2001 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Lennart Augustsson (lennart (at) augustsson.net). 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/ioctl.h> 42 #include <sys/kernel.h> 43 #include <sys/device.h> 44 #include <sys/conf.h> 45 #include <sys/poll.h> 46 #include <sys/select.h> 47 #include <sys/vnode.h> 48 49 #include <dev/ir/ir.h> 50 #include <dev/ir/cirio.h> 51 #include <dev/ir/cirvar.h> 52 53 dev_type_open(ciropen); 54 dev_type_close(circlose); 55 dev_type_read(cirread); 56 dev_type_write(cirwrite); 57 dev_type_ioctl(cirioctl); 58 dev_type_poll(cirpoll); 59 60 const struct cdevsw cir_cdevsw = { 61 ciropen, circlose, cirread, cirwrite, cirioctl, 62 nostop, notty, cirpoll, nommap, 63 }; 64 65 int cir_match(struct device *parent, struct cfdata *match, void *aux); 66 void cir_attach(struct device *parent, struct device *self, void *aux); 67 int cir_activate(struct device *self, enum devact act); 68 int cir_detach(struct device *self, int flags); 69 70 struct cfattach cir_ca = { 71 sizeof(struct cir_softc), cir_match, cir_attach, 72 cir_detach, cir_activate 73 }; 74 75 extern struct cfdriver cir_cd; 76 77 #define CIRUNIT(dev) (minor(dev)) 78 79 int 80 cir_match(struct device *parent, struct cfdata *match, void *aux) 81 { 82 struct ir_attach_args *ia = aux; 83 84 return (ia->ia_type == IR_TYPE_CIR); 85 } 86 87 void 88 cir_attach(struct device *parent, struct device *self, void *aux) 89 { 90 struct cir_softc *sc = (struct cir_softc *)self; 91 struct ir_attach_args *ia = aux; 92 93 sc->sc_methods = ia->ia_methods; 94 sc->sc_handle = ia->ia_handle; 95 96 #ifdef DIAGNOSTIC 97 if (sc->sc_methods->im_read == NULL || 98 sc->sc_methods->im_write == NULL || 99 sc->sc_methods->im_setparams == NULL) 100 panic("%s: missing methods", sc->sc_dev.dv_xname); 101 #endif 102 printf("\n"); 103 } 104 105 int 106 cir_activate(struct device *self, enum devact act) 107 { 108 /*struct cir_softc *sc = (struct cir_softc *)self;*/ 109 110 switch (act) { 111 case DVACT_ACTIVATE: 112 return (EOPNOTSUPP); 113 break; 114 115 case DVACT_DEACTIVATE: 116 break; 117 } 118 return (0); 119 } 120 121 int 122 cir_detach(struct device *self, int flags) 123 { 124 /*struct cir_softc *sc = (struct cir_softc *)self;*/ 125 int maj, mn; 126 127 /* locate the major number */ 128 maj = cdevsw_lookup_major(&cir_cdevsw); 129 130 /* Nuke the vnodes for any open instances (calls close). */ 131 mn = self->dv_unit; 132 vdevgone(maj, mn, mn, VCHR); 133 134 return (0); 135 } 136 137 int 138 ciropen(dev_t dev, int flag, int mode, struct proc *p) 139 { 140 struct cir_softc *sc; 141 int error; 142 143 sc = device_lookup(&cir_cd, CIRUNIT(dev)); 144 if (sc == NULL) 145 return (ENXIO); 146 if ((sc->sc_dev.dv_flags & DVF_ACTIVE) == 0) 147 return (EIO); 148 if (sc->sc_open) 149 return (EBUSY); 150 if (sc->sc_methods->im_open != NULL) { 151 error = sc->sc_methods->im_open(sc->sc_handle, flag, mode, p); 152 if (error) 153 return (error); 154 } 155 sc->sc_open = 1; 156 return (0); 157 } 158 159 int 160 circlose(dev_t dev, int flag, int mode, struct proc *p) 161 { 162 struct cir_softc *sc; 163 int error; 164 165 sc = device_lookup(&cir_cd, CIRUNIT(dev)); 166 if (sc == NULL) 167 return (ENXIO); 168 if (sc->sc_methods->im_close != NULL) 169 error = sc->sc_methods->im_close(sc->sc_handle, flag, mode, p); 170 else 171 error = 0; 172 sc->sc_open = 0; 173 return (error); 174 } 175 176 int 177 cirread(dev_t dev, struct uio *uio, int flag) 178 { 179 struct cir_softc *sc; 180 181 sc = device_lookup(&cir_cd, CIRUNIT(dev)); 182 if (sc == NULL) 183 return (ENXIO); 184 if ((sc->sc_dev.dv_flags & DVF_ACTIVE) == 0) 185 return (EIO); 186 return (sc->sc_methods->im_read(sc->sc_handle, uio, flag)); 187 } 188 189 int 190 cirwrite(dev_t dev, struct uio *uio, int flag) 191 { 192 struct cir_softc *sc; 193 194 sc = device_lookup(&cir_cd, CIRUNIT(dev)); 195 if (sc == NULL) 196 return (ENXIO); 197 if ((sc->sc_dev.dv_flags & DVF_ACTIVE) == 0) 198 return (EIO); 199 return (sc->sc_methods->im_write(sc->sc_handle, uio, flag)); 200 } 201 202 int 203 cirioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p) 204 { 205 struct cir_softc *sc; 206 int error; 207 208 sc = device_lookup(&cir_cd, CIRUNIT(dev)); 209 if (sc == NULL) 210 return (ENXIO); 211 if ((sc->sc_dev.dv_flags & DVF_ACTIVE) == 0) 212 return (EIO); 213 214 switch (cmd) { 215 case FIONBIO: 216 /* All handled in the upper FS layer. */ 217 error = 0; 218 break; 219 case CIR_GET_PARAMS: 220 *(struct cir_params *)addr = sc->sc_params; 221 break; 222 case CIR_SET_PARAMS: 223 error = sc->sc_methods->im_setparams(sc->sc_handle, 224 (struct cir_params *)addr); 225 if (!error) 226 sc->sc_params = *(struct cir_params *)addr; 227 break; 228 default: 229 error = EINVAL; 230 break; 231 } 232 return (error); 233 } 234 235 int 236 cirpoll(dev_t dev, int events, struct proc *p) 237 { 238 struct cir_softc *sc; 239 int revents; 240 int s; 241 242 sc = device_lookup(&cir_cd, CIRUNIT(dev)); 243 if (sc == NULL) 244 return (ENXIO); 245 if ((sc->sc_dev.dv_flags & DVF_ACTIVE) == 0) 246 return (EIO); 247 248 revents = 0; 249 s = splir(); 250 #if 0 251 if (events & (POLLIN | POLLRDNORM)) 252 if (sc->sc_rdframes > 0) 253 revents |= events & (POLLIN | POLLRDNORM); 254 #endif 255 256 #if 0 257 /* How about write? */ 258 if (events & (POLLOUT | POLLWRNORM)) 259 if (???) 260 revents |= events & (POLLOUT | POLLWRNORM); 261 #endif 262 263 if (revents == 0) { 264 if (events & (POLLIN | POLLRDNORM)) 265 selrecord(p, &sc->sc_rdsel); 266 267 #if 0 268 if (events & (POLLOUT | POLLWRNORM)) 269 selrecord(p, &sc->sc_wrsel); 270 #endif 271 } 272 273 splx(s); 274 return (revents); 275 } 276
Indexes created Fri Oct 03 02:09:57 GMT 2025