cir.c revision 1.1
1 /* $NetBSD: cir.c,v 1.1 2001/12/02 10:44:43 augustss 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/cirvar.h> 50 #include <dev/ir/ir.h> 51 52 cdev_decl(cir); 53 54 int cir_match(struct device *parent, struct cfdata *match, void *aux); 55 void cir_attach(struct device *parent, struct device *self, void *aux); 56 int cir_activate(struct device *self, enum devact act); 57 int cir_detach(struct device *self, int flags); 58 59 struct cfattach cir_ca = { 60 sizeof(struct cir_softc), cir_match, cir_attach, 61 cir_detach, cir_activate 62 }; 63 64 extern struct cfdriver cir_cd; 65 66 #define CIRUNIT(dev) (minor(dev)) 67 68 int 69 cir_match(struct device *parent, struct cfdata *match, void *aux) 70 { 71 struct ir_attach_args *ia = aux; 72 73 return (ia->ia_type == IR_TYPE_CIR); 74 } 75 76 void 77 cir_attach(struct device *parent, struct device *self, void *aux) 78 { 79 struct cir_softc *sc = (struct cir_softc *)self; 80 struct ir_attach_args *ia = aux; 81 82 sc->sc_methods = ia->ia_methods; 83 sc->sc_handle = ia->ia_handle; 84 85 #ifdef DIAGNOSTIC 86 if (sc->sc_methods->im_read == NULL || 87 sc->sc_methods->im_write == NULL) 88 panic("%s: missing methods\n", sc->sc_dev.dv_xname); 89 #endif 90 printf("\n"); 91 } 92 93 int 94 cir_activate(struct device *self, enum devact act) 95 { 96 /*struct cir_softc *sc = (struct cir_softc *)self;*/ 97 98 switch (act) { 99 case DVACT_ACTIVATE: 100 return (EOPNOTSUPP); 101 break; 102 103 case DVACT_DEACTIVATE: 104 break; 105 } 106 return (0); 107 } 108 109 int 110 cir_detach(struct device *self, int flags) 111 { 112 /*struct cir_softc *sc = (struct cir_softc *)self;*/ 113 int maj, mn; 114 115 /* locate the major number */ 116 for (maj = 0; maj < nchrdev; maj++) 117 if (cdevsw[maj].d_open == ciropen) 118 break; 119 120 /* Nuke the vnodes for any open instances (calls close). */ 121 mn = self->dv_unit; 122 vdevgone(maj, mn, mn, VCHR); 123 124 return (0); 125 } 126 127 int 128 ciropen(dev_t dev, int flag, int mode, struct proc *p) 129 { 130 struct cir_softc *sc; 131 int error; 132 133 sc = device_lookup(&cir_cd, CIRUNIT(dev)); 134 if (sc == NULL) 135 return (ENXIO); 136 if ((sc->sc_dev.dv_flags & DVF_ACTIVE) == 0) 137 return (EIO); 138 if (sc->sc_open) 139 return (EBUSY); 140 if (sc->sc_methods->im_open != NULL) { 141 error = sc->sc_methods->im_open(sc->sc_handle, flag, mode, p); 142 if (error) 143 return (error); 144 } 145 sc->sc_open = 1; 146 return (0); 147 } 148 149 int 150 circlose(dev_t dev, int flag, int mode, struct proc *p) 151 { 152 struct cir_softc *sc; 153 int error; 154 155 sc = device_lookup(&cir_cd, CIRUNIT(dev)); 156 if (sc == NULL) 157 return (ENXIO); 158 if (sc->sc_methods->im_close != NULL) 159 error = sc->sc_methods->im_close(sc->sc_handle, flag, mode, p); 160 else 161 error = 0; 162 sc->sc_open = 0; 163 return (error); 164 } 165 166 int 167 cirread(dev_t dev, struct uio *uio, int flag) 168 { 169 struct cir_softc *sc; 170 171 sc = device_lookup(&cir_cd, CIRUNIT(dev)); 172 if (sc == NULL) 173 return (ENXIO); 174 if ((sc->sc_dev.dv_flags & DVF_ACTIVE) == 0) 175 return (EIO); 176 return (sc->sc_methods->im_read(sc->sc_handle, uio, flag)); 177 } 178 179 int 180 cirwrite(dev_t dev, struct uio *uio, int flag) 181 { 182 struct cir_softc *sc; 183 184 sc = device_lookup(&cir_cd, CIRUNIT(dev)); 185 if (sc == NULL) 186 return (ENXIO); 187 if ((sc->sc_dev.dv_flags & DVF_ACTIVE) == 0) 188 return (EIO); 189 return (sc->sc_methods->im_write(sc->sc_handle, uio, flag)); 190 } 191 192 int 193 cirioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p) 194 { 195 struct cir_softc *sc; 196 int error; 197 198 sc = device_lookup(&cir_cd, CIRUNIT(dev)); 199 if (sc == NULL) 200 return (ENXIO); 201 if ((sc->sc_dev.dv_flags & DVF_ACTIVE) == 0) 202 return (EIO); 203 204 switch (cmd) { 205 case FIONBIO: 206 /* All handled in the upper FS layer. */ 207 error = 0; 208 break; 209 default: 210 error = EINVAL; 211 break; 212 } 213 return (error); 214 } 215 216 int 217 cirpoll(dev_t dev, int events, struct proc *p) 218 { 219 struct cir_softc *sc; 220 int revents; 221 int s; 222 223 sc = device_lookup(&cir_cd, CIRUNIT(dev)); 224 if (sc == NULL) 225 return (ENXIO); 226 if ((sc->sc_dev.dv_flags & DVF_ACTIVE) == 0) 227 return (EIO); 228 229 revents = 0; 230 s = splir(); 231 #if 0 232 if (events & (POLLIN | POLLRDNORM)) 233 if (sc->sc_rdframes > 0) 234 revents |= events & (POLLIN | POLLRDNORM); 235 #endif 236 237 #if 0 238 /* How about write? */ 239 if (events & (POLLOUT | POLLWRNORM)) 240 if (???) 241 revents |= events & (POLLOUT | POLLWRNORM); 242 #endif 243 244 if (revents == 0) { 245 if (events & (POLLIN | POLLRDNORM)) 246 selrecord(p, &sc->sc_rdsel); 247 248 #if 0 249 if (events & (POLLOUT | POLLWRNORM)) 250 selrecord(p, &sc->sc_wrsel); 251 #endif 252 } 253 254 splx(s); 255 return (revents); 256 } 257
Indexes created Thu Oct 02 14:10:14 GMT 2025