cir.c revision 1.25
1 /* $NetBSD: cir.c,v 1.25 2009/05/12 14:29:42 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 1.25 2009/05/12 14:29:42 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 56 const struct cdevsw cir_cdevsw = { 57 ciropen, circlose, cirread, cirwrite, cirioctl, 58 nostop, notty, cirpoll, nommap, nokqfilter, 59 D_OTHER 60 }; 61 62 int cir_match(device_t parent, cfdata_t match, void *aux); 63 void cir_attach(device_t parent, device_t self, void *aux); 64 int cir_activate(device_t self, enum devact act); 65 int cir_detach(device_t self, int flags); 66 67 CFATTACH_DECL(cir, sizeof(struct cir_softc), 68 cir_match, cir_attach, cir_detach, cir_activate); 69 70 extern struct cfdriver cir_cd; 71 72 #define CIRUNIT(dev) (minor(dev)) 73 74 int 75 cir_match(device_t parent, cfdata_t match, void *aux) 76 { 77 struct ir_attach_args *ia = aux; 78 79 return (ia->ia_type == IR_TYPE_CIR); 80 } 81 82 void 83 cir_attach(device_t parent, device_t self, void *aux) 84 { 85 struct cir_softc *sc = device_private(self); 86 struct ir_attach_args *ia = aux; 87 88 selinit(&sc->sc_rdsel); 89 sc->sc_methods = ia->ia_methods; 90 sc->sc_handle = ia->ia_handle; 91 92 #ifdef DIAGNOSTIC 93 if (sc->sc_methods->im_read == NULL || 94 sc->sc_methods->im_write == NULL || 95 sc->sc_methods->im_setparams == NULL) 96 panic("%s: missing methods", device_xname(&sc->sc_dev)); 97 #endif 98 printf("\n"); 99 } 100 101 int 102 cir_activate(device_t self, enum devact act) 103 { 104 /*struct cir_softc *sc = device_private(self);*/ 105 106 switch (act) { 107 case DVACT_ACTIVATE: 108 return (EOPNOTSUPP); 109 break; 110 111 case DVACT_DEACTIVATE: 112 break; 113 } 114 return (0); 115 } 116 117 int 118 cir_detach(device_t self, int flags) 119 { 120 struct cir_softc *sc = device_private(self); 121 int maj, mn; 122 123 /* locate the major number */ 124 maj = cdevsw_lookup_major(&cir_cdevsw); 125 126 /* Nuke the vnodes for any open instances (calls close). */ 127 mn = device_unit(self); 128 vdevgone(maj, mn, mn, VCHR); 129 130 seldestroy(&sc->sc_rdsel); 131 132 return (0); 133 } 134 135 int 136 ciropen(dev_t dev, int flag, int mode, struct lwp *l) 137 { 138 struct cir_softc *sc; 139 int error; 140 141 sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); 142 if (sc == NULL) 143 return (ENXIO); 144 if (!device_is_active(&sc->sc_dev)) 145 return (EIO); 146 if (sc->sc_open) 147 return (EBUSY); 148 149 sc->sc_rdframes = 0; 150 if (sc->sc_methods->im_open != NULL) { 151 error = sc->sc_methods->im_open(sc->sc_handle, flag, mode, 152 l->l_proc); 153 if (error) 154 return (error); 155 } 156 sc->sc_open = 1; 157 return (0); 158 } 159 160 int 161 circlose(dev_t dev, int flag, int mode, struct lwp *l) 162 { 163 struct cir_softc *sc; 164 int error; 165 166 sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); 167 if (sc == NULL) 168 return (ENXIO); 169 if (sc->sc_methods->im_close != NULL) 170 error = sc->sc_methods->im_close(sc->sc_handle, flag, mode, 171 l->l_proc); 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_private(&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_private(&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, void *addr, int flag, struct lwp *l) 206 { 207 struct cir_softc *sc; 208 int error; 209 210 sc = device_lookup_private(&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 error = 0; 224 break; 225 case CIR_SET_PARAMS: 226 error = sc->sc_methods->im_setparams(sc->sc_handle, 227 (struct cir_params *)addr); 228 if (!error) 229 sc->sc_params = *(struct cir_params *)addr; 230 break; 231 default: 232 error = EINVAL; 233 break; 234 } 235 return (error); 236 } 237 238 int 239 cirpoll(dev_t dev, int events, struct lwp *l) 240 { 241 struct cir_softc *sc; 242 int revents; 243 int s; 244 245 sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); 246 if (sc == NULL) 247 return (POLLERR); 248 if (!device_is_active(&sc->sc_dev)) 249 return (POLLERR); 250 251 revents = 0; 252 s = splir(); 253 if (events & (POLLIN | POLLRDNORM)) 254 if (sc->sc_rdframes > 0) 255 revents |= events & (POLLIN | POLLRDNORM); 256 257 #if 0 258 /* How about write? */ 259 if (events & (POLLOUT | POLLWRNORM)) 260 if (/* ??? */) 261 revents |= events & (POLLOUT | POLLWRNORM); 262 #endif 263 264 if (revents == 0) { 265 if (events & (POLLIN | POLLRDNORM)) 266 selrecord(l, &sc->sc_rdsel); 267 268 #if 0 269 if (events & (POLLOUT | POLLWRNORM)) 270 selrecord(p, &sc->sc_wrsel); 271 #endif 272 } 273 274 splx(s); 275 return (revents); 276 } 277
Indexes created Fri Oct 03 02:09:57 GMT 2025