cir.c revision 1.14
1 /* $NetBSD: cir.c,v 1.14 2006/03/29 06:47:06 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/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: cir.c,v 1.14 2006/03/29 06:47:06 thorpej 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 }; 68 69 int cir_match(struct device *parent, struct cfdata *match, void *aux); 70 void cir_attach(struct device *parent, struct device *self, void *aux); 71 int cir_activate(struct device *self, enum devact act); 72 int cir_detach(struct device *self, int flags); 73 74 CFATTACH_DECL(cir, sizeof(struct cir_softc), 75 cir_match, cir_attach, cir_detach, cir_activate); 76 77 extern struct cfdriver cir_cd; 78 79 #define CIRUNIT(dev) (minor(dev)) 80 81 int 82 cir_match(struct device *parent, struct cfdata *match, void *aux) 83 { 84 struct ir_attach_args *ia = aux; 85 86 return (ia->ia_type == IR_TYPE_CIR); 87 } 88 89 void 90 cir_attach(struct device *parent, struct device *self, void *aux) 91 { 92 struct cir_softc *sc = device_private(self); 93 struct ir_attach_args *ia = aux; 94 95 sc->sc_methods = ia->ia_methods; 96 sc->sc_handle = ia->ia_handle; 97 98 #ifdef DIAGNOSTIC 99 if (sc->sc_methods->im_read == NULL || 100 sc->sc_methods->im_write == NULL || 101 sc->sc_methods->im_setparams == NULL) 102 panic("%s: missing methods", sc->sc_dev.dv_xname); 103 #endif 104 printf("\n"); 105 } 106 107 int 108 cir_activate(struct device *self, enum devact act) 109 { 110 /*struct cir_softc *sc = device_private(self);*/ 111 112 switch (act) { 113 case DVACT_ACTIVATE: 114 return (EOPNOTSUPP); 115 break; 116 117 case DVACT_DEACTIVATE: 118 break; 119 } 120 return (0); 121 } 122 123 int 124 cir_detach(struct device *self, int flags) 125 { 126 /*struct cir_softc *sc = device_private(self);*/ 127 int maj, mn; 128 129 /* locate the major number */ 130 maj = cdevsw_lookup_major(&cir_cdevsw); 131 132 /* Nuke the vnodes for any open instances (calls close). */ 133 mn = device_unit(self); 134 vdevgone(maj, mn, mn, VCHR); 135 136 return (0); 137 } 138 139 int 140 ciropen(dev_t dev, int flag, int mode, struct proc *p) 141 { 142 struct cir_softc *sc; 143 int error; 144 145 sc = device_lookup(&cir_cd, CIRUNIT(dev)); 146 if (sc == NULL) 147 return (ENXIO); 148 if (!device_is_active(&sc->sc_dev)) 149 return (EIO); 150 if (sc->sc_open) 151 return (EBUSY); 152 if (sc->sc_methods->im_open != NULL) { 153 error = sc->sc_methods->im_open(sc->sc_handle, flag, mode, p); 154 if (error) 155 return (error); 156 } 157 sc->sc_open = 1; 158 return (0); 159 } 160 161 int 162 circlose(dev_t dev, int flag, int mode, struct proc *p) 163 { 164 struct cir_softc *sc; 165 int error; 166 167 sc = device_lookup(&cir_cd, CIRUNIT(dev)); 168 if (sc == NULL) 169 return (ENXIO); 170 if (sc->sc_methods->im_close != NULL) 171 error = sc->sc_methods->im_close(sc->sc_handle, flag, mode, p); 172 else 173 error = 0; 174 sc->sc_open = 0; 175 return (error); 176 } 177 178 int 179 cirread(dev_t dev, struct uio *uio, int flag) 180 { 181 struct cir_softc *sc; 182 183 sc = device_lookup(&cir_cd, CIRUNIT(dev)); 184 if (sc == NULL) 185 return (ENXIO); 186 if (!device_is_active(&sc->sc_dev)) 187 return (EIO); 188 return (sc->sc_methods->im_read(sc->sc_handle, uio, flag)); 189 } 190 191 int 192 cirwrite(dev_t dev, struct uio *uio, int flag) 193 { 194 struct cir_softc *sc; 195 196 sc = device_lookup(&cir_cd, CIRUNIT(dev)); 197 if (sc == NULL) 198 return (ENXIO); 199 if (!device_is_active(&sc->sc_dev)) 200 return (EIO); 201 return (sc->sc_methods->im_write(sc->sc_handle, uio, flag)); 202 } 203 204 int 205 cirioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p) 206 { 207 struct cir_softc *sc; 208 int error; 209 210 sc = device_lookup(&cir_cd, CIRUNIT(dev)); 211 if (sc == NULL) 212 return (ENXIO); 213 if (!device_is_active(&sc->sc_dev)) 214 return (EIO); 215 216 switch (cmd) { 217 case FIONBIO: 218 /* All handled in the upper FS layer. */ 219 error = 0; 220 break; 221 case CIR_GET_PARAMS: 222 *(struct cir_params *)addr = sc->sc_params; 223 break; 224 case CIR_SET_PARAMS: 225 error = sc->sc_methods->im_setparams(sc->sc_handle, 226 (struct cir_params *)addr); 227 if (!error) 228 sc->sc_params = *(struct cir_params *)addr; 229 break; 230 default: 231 error = EINVAL; 232 break; 233 } 234 return (error); 235 } 236 237 int 238 cirpoll(dev_t dev, int events, struct proc *p) 239 { 240 struct cir_softc *sc; 241 int revents; 242 int s; 243 244 sc = device_lookup(&cir_cd, CIRUNIT(dev)); 245 if (sc == NULL) 246 return (POLLERR); 247 if (!device_is_active(&sc->sc_dev)) 248 return (POLLERR); 249 250 revents = 0; 251 s = splir(); 252 #if 0 253 if (events & (POLLIN | POLLRDNORM)) 254 if (sc->sc_rdframes > 0) 255 revents |= events & (POLLIN | POLLRDNORM); 256 #endif 257 258 #if 0 259 /* How about write? */ 260 if (events & (POLLOUT | POLLWRNORM)) 261 if (???) 262 revents |= events & (POLLOUT | POLLWRNORM); 263 #endif 264 265 if (revents == 0) { 266 if (events & (POLLIN | POLLRDNORM)) 267 selrecord(p, &sc->sc_rdsel); 268 269 #if 0 270 if (events & (POLLOUT | POLLWRNORM)) 271 selrecord(p, &sc->sc_wrsel); 272 #endif 273 } 274 275 splx(s); 276 return (revents); 277 } 278
Indexes created Thu Oct 02 14:10:14 GMT 2025