cir.c revision 1.6
1 /* $NetBSD: cir.c,v 1.6 2002/09/30 21:22:22 thorpej 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 CFATTACH_DECL(cir, sizeof(struct cir_softc), 71 cir_match, cir_attach, cir_detach, cir_activate) 72 73 extern struct cfdriver cir_cd; 74 75 #define CIRUNIT(dev) (minor(dev)) 76 77 int 78 cir_match(struct device *parent, struct cfdata *match, void *aux) 79 { 80 struct ir_attach_args *ia = aux; 81 82 return (ia->ia_type == IR_TYPE_CIR); 83 } 84 85 void 86 cir_attach(struct device *parent, struct device *self, void *aux) 87 { 88 struct cir_softc *sc = (struct cir_softc *)self; 89 struct ir_attach_args *ia = aux; 90 91 sc->sc_methods = ia->ia_methods; 92 sc->sc_handle = ia->ia_handle; 93 94 #ifdef DIAGNOSTIC 95 if (sc->sc_methods->im_read == NULL || 96 sc->sc_methods->im_write == NULL || 97 sc->sc_methods->im_setparams == NULL) 98 panic("%s: missing methods", sc->sc_dev.dv_xname); 99 #endif 100 printf("\n"); 101 } 102 103 int 104 cir_activate(struct device *self, enum devact act) 105 { 106 /*struct cir_softc *sc = (struct cir_softc *)self;*/ 107 108 switch (act) { 109 case DVACT_ACTIVATE: 110 return (EOPNOTSUPP); 111 break; 112 113 case DVACT_DEACTIVATE: 114 break; 115 } 116 return (0); 117 } 118 119 int 120 cir_detach(struct device *self, int flags) 121 { 122 /*struct cir_softc *sc = (struct cir_softc *)self;*/ 123 int maj, mn; 124 125 /* locate the major number */ 126 maj = cdevsw_lookup_major(&cir_cdevsw); 127 128 /* Nuke the vnodes for any open instances (calls close). */ 129 mn = self->dv_unit; 130 vdevgone(maj, mn, mn, VCHR); 131 132 return (0); 133 } 134 135 int 136 ciropen(dev_t dev, int flag, int mode, struct proc *p) 137 { 138 struct cir_softc *sc; 139 int error; 140 141 sc = device_lookup(&cir_cd, CIRUNIT(dev)); 142 if (sc == NULL) 143 return (ENXIO); 144 if ((sc->sc_dev.dv_flags & DVF_ACTIVE) == 0) 145 return (EIO); 146 if (sc->sc_open) 147 return (EBUSY); 148 if (sc->sc_methods->im_open != NULL) { 149 error = sc->sc_methods->im_open(sc->sc_handle, flag, mode, p); 150 if (error) 151 return (error); 152 } 153 sc->sc_open = 1; 154 return (0); 155 } 156 157 int 158 circlose(dev_t dev, int flag, int mode, struct proc *p) 159 { 160 struct cir_softc *sc; 161 int error; 162 163 sc = device_lookup(&cir_cd, CIRUNIT(dev)); 164 if (sc == NULL) 165 return (ENXIO); 166 if (sc->sc_methods->im_close != NULL) 167 error = sc->sc_methods->im_close(sc->sc_handle, flag, mode, p); 168 else 169 error = 0; 170 sc->sc_open = 0; 171 return (error); 172 } 173 174 int 175 cirread(dev_t dev, struct uio *uio, int flag) 176 { 177 struct cir_softc *sc; 178 179 sc = device_lookup(&cir_cd, CIRUNIT(dev)); 180 if (sc == NULL) 181 return (ENXIO); 182 if ((sc->sc_dev.dv_flags & DVF_ACTIVE) == 0) 183 return (EIO); 184 return (sc->sc_methods->im_read(sc->sc_handle, uio, flag)); 185 } 186 187 int 188 cirwrite(dev_t dev, struct uio *uio, int flag) 189 { 190 struct cir_softc *sc; 191 192 sc = device_lookup(&cir_cd, CIRUNIT(dev)); 193 if (sc == NULL) 194 return (ENXIO); 195 if ((sc->sc_dev.dv_flags & DVF_ACTIVE) == 0) 196 return (EIO); 197 return (sc->sc_methods->im_write(sc->sc_handle, uio, flag)); 198 } 199 200 int 201 cirioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p) 202 { 203 struct cir_softc *sc; 204 int error; 205 206 sc = device_lookup(&cir_cd, CIRUNIT(dev)); 207 if (sc == NULL) 208 return (ENXIO); 209 if ((sc->sc_dev.dv_flags & DVF_ACTIVE) == 0) 210 return (EIO); 211 212 switch (cmd) { 213 case FIONBIO: 214 /* All handled in the upper FS layer. */ 215 error = 0; 216 break; 217 case CIR_GET_PARAMS: 218 *(struct cir_params *)addr = sc->sc_params; 219 break; 220 case CIR_SET_PARAMS: 221 error = sc->sc_methods->im_setparams(sc->sc_handle, 222 (struct cir_params *)addr); 223 if (!error) 224 sc->sc_params = *(struct cir_params *)addr; 225 break; 226 default: 227 error = EINVAL; 228 break; 229 } 230 return (error); 231 } 232 233 int 234 cirpoll(dev_t dev, int events, struct proc *p) 235 { 236 struct cir_softc *sc; 237 int revents; 238 int s; 239 240 sc = device_lookup(&cir_cd, CIRUNIT(dev)); 241 if (sc == NULL) 242 return (ENXIO); 243 if ((sc->sc_dev.dv_flags & DVF_ACTIVE) == 0) 244 return (EIO); 245 246 revents = 0; 247 s = splir(); 248 #if 0 249 if (events & (POLLIN | POLLRDNORM)) 250 if (sc->sc_rdframes > 0) 251 revents |= events & (POLLIN | POLLRDNORM); 252 #endif 253 254 #if 0 255 /* How about write? */ 256 if (events & (POLLOUT | POLLWRNORM)) 257 if (???) 258 revents |= events & (POLLOUT | POLLWRNORM); 259 #endif 260 261 if (revents == 0) { 262 if (events & (POLLIN | POLLRDNORM)) 263 selrecord(p, &sc->sc_rdsel); 264 265 #if 0 266 if (events & (POLLOUT | POLLWRNORM)) 267 selrecord(p, &sc->sc_wrsel); 268 #endif 269 } 270 271 splx(s); 272 return (revents); 273 } 274
Indexes created Thu Oct 02 14:10:14 GMT 2025