cir.c revision 1.21
1 /* $NetBSD: cir.c,v 1.21 2008/06/11 20:52:14 cegger 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: cir.c,v 1.21 2008/06/11 20:52:14 cegger Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/ioctl.h> 38 #include <sys/kernel.h> 39 #include <sys/device.h> 40 #include <sys/conf.h> 41 #include <sys/poll.h> 42 #include <sys/select.h> 43 #include <sys/vnode.h> 44 45 #include <dev/ir/ir.h> 46 #include <dev/ir/cirio.h> 47 #include <dev/ir/cirvar.h> 48 49 dev_type_open(ciropen); 50 dev_type_close(circlose); 51 dev_type_read(cirread); 52 dev_type_write(cirwrite); 53 dev_type_ioctl(cirioctl); 54 dev_type_poll(cirpoll); 55 dev_type_kqfilter(cirkqfilter); 56 57 const struct cdevsw cir_cdevsw = { 58 ciropen, circlose, cirread, cirwrite, cirioctl, 59 nostop, notty, cirpoll, nommap, cirkqfilter, 60 D_OTHER 61 }; 62 63 int cir_match(struct device *parent, struct cfdata *match, void *aux); 64 void cir_attach(struct device *parent, struct device *self, void *aux); 65 int cir_activate(struct device *self, enum devact act); 66 int cir_detach(struct device *self, int flags); 67 68 CFATTACH_DECL(cir, sizeof(struct cir_softc), 69 cir_match, cir_attach, cir_detach, cir_activate); 70 71 extern struct cfdriver cir_cd; 72 73 #define CIRUNIT(dev) (minor(dev)) 74 75 int 76 cir_match(struct device *parent, struct cfdata *match, void *aux) 77 { 78 struct ir_attach_args *ia = aux; 79 80 return (ia->ia_type == IR_TYPE_CIR); 81 } 82 83 void 84 cir_attach(struct device *parent, struct device *self, void *aux) 85 { 86 struct cir_softc *sc = device_private(self); 87 struct ir_attach_args *ia = aux; 88 89 selinit(&sc->sc_rdsel); 90 sc->sc_methods = ia->ia_methods; 91 sc->sc_handle = ia->ia_handle; 92 93 #ifdef DIAGNOSTIC 94 if (sc->sc_methods->im_read == NULL || 95 sc->sc_methods->im_write == NULL || 96 sc->sc_methods->im_setparams == NULL) 97 panic("%s: missing methods", device_xname(&sc->sc_dev)); 98 #endif 99 printf("\n"); 100 } 101 102 int 103 cir_activate(struct device *self, enum devact act) 104 { 105 /*struct cir_softc *sc = device_private(self);*/ 106 107 switch (act) { 108 case DVACT_ACTIVATE: 109 return (EOPNOTSUPP); 110 break; 111 112 case DVACT_DEACTIVATE: 113 break; 114 } 115 return (0); 116 } 117 118 int 119 cir_detach(struct device *self, int flags) 120 { 121 struct cir_softc *sc = device_private(self); 122 int maj, mn; 123 124 /* locate the major number */ 125 maj = cdevsw_lookup_major(&cir_cdevsw); 126 127 /* Nuke the vnodes for any open instances (calls close). */ 128 mn = device_unit(self); 129 vdevgone(maj, mn, mn, VCHR); 130 131 seldestroy(&sc->sc_rdsel); 132 133 return (0); 134 } 135 136 int 137 ciropen(dev_t dev, int flag, int mode, struct lwp *l) 138 { 139 struct cir_softc *sc; 140 int error; 141 142 sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); 143 if (sc == NULL) 144 return (ENXIO); 145 if (!device_is_active(&sc->sc_dev)) 146 return (EIO); 147 if (sc->sc_open) 148 return (EBUSY); 149 if (sc->sc_methods->im_open != NULL) { 150 error = sc->sc_methods->im_open(sc->sc_handle, flag, mode, 151 l->l_proc); 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 lwp *l) 161 { 162 struct cir_softc *sc; 163 int error; 164 165 sc = device_lookup_private(&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, 170 l->l_proc); 171 else 172 error = 0; 173 sc->sc_open = 0; 174 return (error); 175 } 176 177 int 178 cirread(dev_t dev, struct uio *uio, int flag) 179 { 180 struct cir_softc *sc; 181 182 sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); 183 if (sc == NULL) 184 return (ENXIO); 185 if (!device_is_active(&sc->sc_dev)) 186 return (EIO); 187 return (sc->sc_methods->im_read(sc->sc_handle, uio, flag)); 188 } 189 190 int 191 cirwrite(dev_t dev, struct uio *uio, int flag) 192 { 193 struct cir_softc *sc; 194 195 sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); 196 if (sc == NULL) 197 return (ENXIO); 198 if (!device_is_active(&sc->sc_dev)) 199 return (EIO); 200 return (sc->sc_methods->im_write(sc->sc_handle, uio, flag)); 201 } 202 203 int 204 cirioctl(dev_t dev, u_long cmd, void *addr, int flag, struct lwp *l) 205 { 206 struct cir_softc *sc; 207 int error; 208 209 sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); 210 if (sc == NULL) 211 return (ENXIO); 212 if (!device_is_active(&sc->sc_dev)) 213 return (EIO); 214 215 switch (cmd) { 216 case FIONBIO: 217 /* All handled in the upper FS layer. */ 218 error = 0; 219 break; 220 case CIR_GET_PARAMS: 221 *(struct cir_params *)addr = sc->sc_params; 222 error = 0; 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 lwp *l) 239 { 240 struct cir_softc *sc; 241 int revents; 242 int s; 243 244 sc = device_lookup_private(&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(l, &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 Fri Oct 03 02:09:57 GMT 2025