cir.c revision 1.17
1 /* $NetBSD: cir.c,v 1.17 2007/03/04 06:02:09 christos 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/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: cir.c,v 1.17 2007/03/04 06:02:09 christos Exp $"); 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/ioctl.h> 45 #include <sys/kernel.h> 46 #include <sys/device.h> 47 #include <sys/conf.h> 48 #include <sys/poll.h> 49 #include <sys/select.h> 50 #include <sys/vnode.h> 51 52 #include <dev/ir/ir.h> 53 #include <dev/ir/cirio.h> 54 #include <dev/ir/cirvar.h> 55 56 dev_type_open(ciropen); 57 dev_type_close(circlose); 58 dev_type_read(cirread); 59 dev_type_write(cirwrite); 60 dev_type_ioctl(cirioctl); 61 dev_type_poll(cirpoll); 62 dev_type_kqfilter(cirkqfilter); 63 64 const struct cdevsw cir_cdevsw = { 65 ciropen, circlose, cirread, cirwrite, cirioctl, 66 nostop, notty, cirpoll, nommap, cirkqfilter, 67 D_OTHER 68 }; 69 70 int cir_match(struct device *parent, struct cfdata *match, void *aux); 71 void cir_attach(struct device *parent, struct device *self, void *aux); 72 int cir_activate(struct device *self, enum devact act); 73 int cir_detach(struct device *self, int flags); 74 75 CFATTACH_DECL(cir, sizeof(struct cir_softc), 76 cir_match, cir_attach, cir_detach, cir_activate); 77 78 extern struct cfdriver cir_cd; 79 80 #define CIRUNIT(dev) (minor(dev)) 81 82 int 83 cir_match(struct device *parent, struct cfdata *match, void *aux) 84 { 85 struct ir_attach_args *ia = aux; 86 87 return (ia->ia_type == IR_TYPE_CIR); 88 } 89 90 void 91 cir_attach(struct device *parent, struct device *self, void *aux) 92 { 93 struct cir_softc *sc = device_private(self); 94 struct ir_attach_args *ia = aux; 95 96 sc->sc_methods = ia->ia_methods; 97 sc->sc_handle = ia->ia_handle; 98 99 #ifdef DIAGNOSTIC 100 if (sc->sc_methods->im_read == NULL || 101 sc->sc_methods->im_write == NULL || 102 sc->sc_methods->im_setparams == NULL) 103 panic("%s: missing methods", sc->sc_dev.dv_xname); 104 #endif 105 printf("\n"); 106 } 107 108 int 109 cir_activate(struct device *self, enum devact act) 110 { 111 /*struct cir_softc *sc = device_private(self);*/ 112 113 switch (act) { 114 case DVACT_ACTIVATE: 115 return (EOPNOTSUPP); 116 break; 117 118 case DVACT_DEACTIVATE: 119 break; 120 } 121 return (0); 122 } 123 124 int 125 cir_detach(struct device *self, int flags) 126 { 127 /*struct cir_softc *sc = device_private(self);*/ 128 int maj, mn; 129 130 /* locate the major number */ 131 maj = cdevsw_lookup_major(&cir_cdevsw); 132 133 /* Nuke the vnodes for any open instances (calls close). */ 134 mn = device_unit(self); 135 vdevgone(maj, mn, mn, VCHR); 136 137 return (0); 138 } 139 140 int 141 ciropen(dev_t dev, int flag, int mode, struct lwp *l) 142 { 143 struct cir_softc *sc; 144 int error; 145 146 sc = device_lookup(&cir_cd, CIRUNIT(dev)); 147 if (sc == NULL) 148 return (ENXIO); 149 if (!device_is_active(&sc->sc_dev)) 150 return (EIO); 151 if (sc->sc_open) 152 return (EBUSY); 153 if (sc->sc_methods->im_open != NULL) { 154 error = sc->sc_methods->im_open(sc->sc_handle, flag, mode, 155 l->l_proc); 156 if (error) 157 return (error); 158 } 159 sc->sc_open = 1; 160 return (0); 161 } 162 163 int 164 circlose(dev_t dev, int flag, int mode, struct lwp *l) 165 { 166 struct cir_softc *sc; 167 int error; 168 169 sc = device_lookup(&cir_cd, CIRUNIT(dev)); 170 if (sc == NULL) 171 return (ENXIO); 172 if (sc->sc_methods->im_close != NULL) 173 error = sc->sc_methods->im_close(sc->sc_handle, flag, mode, 174 l->l_proc); 175 else 176 error = 0; 177 sc->sc_open = 0; 178 return (error); 179 } 180 181 int 182 cirread(dev_t dev, struct uio *uio, int flag) 183 { 184 struct cir_softc *sc; 185 186 sc = device_lookup(&cir_cd, CIRUNIT(dev)); 187 if (sc == NULL) 188 return (ENXIO); 189 if (!device_is_active(&sc->sc_dev)) 190 return (EIO); 191 return (sc->sc_methods->im_read(sc->sc_handle, uio, flag)); 192 } 193 194 int 195 cirwrite(dev_t dev, struct uio *uio, int flag) 196 { 197 struct cir_softc *sc; 198 199 sc = device_lookup(&cir_cd, CIRUNIT(dev)); 200 if (sc == NULL) 201 return (ENXIO); 202 if (!device_is_active(&sc->sc_dev)) 203 return (EIO); 204 return (sc->sc_methods->im_write(sc->sc_handle, uio, flag)); 205 } 206 207 int 208 cirioctl(dev_t dev, u_long cmd, void *addr, int flag, struct lwp *l) 209 { 210 struct cir_softc *sc; 211 int error; 212 213 sc = device_lookup(&cir_cd, CIRUNIT(dev)); 214 if (sc == NULL) 215 return (ENXIO); 216 if (!device_is_active(&sc->sc_dev)) 217 return (EIO); 218 219 switch (cmd) { 220 case FIONBIO: 221 /* All handled in the upper FS layer. */ 222 error = 0; 223 break; 224 case CIR_GET_PARAMS: 225 *(struct cir_params *)addr = sc->sc_params; 226 error = 0; 227 break; 228 case CIR_SET_PARAMS: 229 error = sc->sc_methods->im_setparams(sc->sc_handle, 230 (struct cir_params *)addr); 231 if (!error) 232 sc->sc_params = *(struct cir_params *)addr; 233 break; 234 default: 235 error = EINVAL; 236 break; 237 } 238 return (error); 239 } 240 241 int 242 cirpoll(dev_t dev, int events, struct lwp *l) 243 { 244 struct cir_softc *sc; 245 int revents; 246 int s; 247 248 sc = device_lookup(&cir_cd, CIRUNIT(dev)); 249 if (sc == NULL) 250 return (POLLERR); 251 if (!device_is_active(&sc->sc_dev)) 252 return (POLLERR); 253 254 revents = 0; 255 s = splir(); 256 #if 0 257 if (events & (POLLIN | POLLRDNORM)) 258 if (sc->sc_rdframes > 0) 259 revents |= events & (POLLIN | POLLRDNORM); 260 #endif 261 262 #if 0 263 /* How about write? */ 264 if (events & (POLLOUT | POLLWRNORM)) 265 if (/* ??? */) 266 revents |= events & (POLLOUT | POLLWRNORM); 267 #endif 268 269 if (revents == 0) { 270 if (events & (POLLIN | POLLRDNORM)) 271 selrecord(l, &sc->sc_rdsel); 272 273 #if 0 274 if (events & (POLLOUT | POLLWRNORM)) 275 selrecord(p, &sc->sc_wrsel); 276 #endif 277 } 278 279 splx(s); 280 return (revents); 281 } 282
Indexes created Thu Oct 02 14:10:14 GMT 2025