cir.c revision 1.29
1 /* $NetBSD: cir.c,v 1.29 2011/07/26 08:59:38 mrg 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 1.29 2011/07/26 08:59:38 mrg 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 #include <sys/module.h> 45 46 #include <dev/ir/ir.h> 47 #include <dev/ir/cirio.h> 48 #include <dev/ir/cirvar.h> 49 50 dev_type_open(ciropen); 51 dev_type_close(circlose); 52 dev_type_read(cirread); 53 dev_type_write(cirwrite); 54 dev_type_ioctl(cirioctl); 55 dev_type_poll(cirpoll); 56 57 const struct cdevsw cir_cdevsw = { 58 ciropen, circlose, cirread, cirwrite, cirioctl, 59 nostop, notty, cirpoll, nommap, nokqfilter, 60 D_OTHER 61 }; 62 63 int cir_match(device_t parent, cfdata_t match, void *aux); 64 void cir_attach(device_t parent, device_t self, void *aux); 65 int cir_detach(device_t self, int flags); 66 67 CFATTACH_DECL_NEW(cir, sizeof(struct cir_softc), 68 cir_match, cir_attach, cir_detach, NULL); 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 sc->sc_dev = self; 89 90 selinit(&sc->sc_rdsel); 91 sc->sc_methods = ia->ia_methods; 92 sc->sc_handle = ia->ia_handle; 93 94 #ifdef DIAGNOSTIC 95 if (sc->sc_methods->im_read == NULL || 96 sc->sc_methods->im_write == NULL || 97 sc->sc_methods->im_setparams == NULL) 98 panic("%s: missing methods", device_xname(sc->sc_dev)); 99 #endif 100 printf("\n"); 101 } 102 103 int 104 cir_detach(device_t self, int flags) 105 { 106 struct cir_softc *sc = device_private(self); 107 int maj, mn; 108 109 /* locate the major number */ 110 maj = cdevsw_lookup_major(&cir_cdevsw); 111 112 /* Nuke the vnodes for any open instances (calls close). */ 113 mn = device_unit(self); 114 vdevgone(maj, mn, mn, VCHR); 115 116 seldestroy(&sc->sc_rdsel); 117 118 return (0); 119 } 120 121 int 122 ciropen(dev_t dev, int flag, int mode, struct lwp *l) 123 { 124 struct cir_softc *sc; 125 int error; 126 127 sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); 128 if (sc == NULL) 129 return (ENXIO); 130 if (!device_is_active(sc->sc_dev)) 131 return (EIO); 132 if (sc->sc_open) 133 return (EBUSY); 134 135 sc->sc_rdframes = 0; 136 if (sc->sc_methods->im_open != NULL) { 137 error = sc->sc_methods->im_open(sc->sc_handle, flag, mode, 138 l->l_proc); 139 if (error) 140 return (error); 141 } 142 sc->sc_open = 1; 143 return (0); 144 } 145 146 int 147 circlose(dev_t dev, int flag, int mode, struct lwp *l) 148 { 149 struct cir_softc *sc; 150 int error; 151 152 sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); 153 if (sc == NULL) 154 return (ENXIO); 155 if (sc->sc_methods->im_close != NULL) 156 error = sc->sc_methods->im_close(sc->sc_handle, flag, mode, 157 l->l_proc); 158 else 159 error = 0; 160 sc->sc_open = 0; 161 return (error); 162 } 163 164 int 165 cirread(dev_t dev, struct uio *uio, int flag) 166 { 167 struct cir_softc *sc; 168 169 sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); 170 if (sc == NULL) 171 return (ENXIO); 172 if (!device_is_active(sc->sc_dev)) 173 return (EIO); 174 return (sc->sc_methods->im_read(sc->sc_handle, uio, flag)); 175 } 176 177 int 178 cirwrite(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_write(sc->sc_handle, uio, flag)); 188 } 189 190 int 191 cirioctl(dev_t dev, u_long cmd, void *addr, int flag, struct lwp *l) 192 { 193 struct cir_softc *sc; 194 int error; 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); 201 202 switch (cmd) { 203 case FIONBIO: 204 /* All handled in the upper FS layer. */ 205 error = 0; 206 break; 207 case CIR_GET_PARAMS: 208 *(struct cir_params *)addr = sc->sc_params; 209 error = 0; 210 break; 211 case CIR_SET_PARAMS: 212 error = sc->sc_methods->im_setparams(sc->sc_handle, 213 (struct cir_params *)addr); 214 if (!error) 215 sc->sc_params = *(struct cir_params *)addr; 216 break; 217 default: 218 error = EINVAL; 219 break; 220 } 221 return (error); 222 } 223 224 int 225 cirpoll(dev_t dev, int events, struct lwp *l) 226 { 227 struct cir_softc *sc; 228 int revents; 229 int s; 230 231 sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); 232 if (sc == NULL) 233 return (POLLERR); 234 if (!device_is_active(sc->sc_dev)) 235 return (POLLERR); 236 237 revents = 0; 238 s = splir(); 239 if (events & (POLLIN | POLLRDNORM)) 240 if (sc->sc_rdframes > 0) 241 revents |= events & (POLLIN | POLLRDNORM); 242 243 #if 0 244 /* How about write? */ 245 if (events & (POLLOUT | POLLWRNORM)) 246 if (/* ??? */) 247 revents |= events & (POLLOUT | POLLWRNORM); 248 #endif 249 250 if (revents == 0) { 251 if (events & (POLLIN | POLLRDNORM)) 252 selrecord(l, &sc->sc_rdsel); 253 254 #if 0 255 if (events & (POLLOUT | POLLWRNORM)) 256 selrecord(p, &sc->sc_wrsel); 257 #endif 258 } 259 260 splx(s); 261 return (revents); 262 } 263 264 MODULE(MODULE_CLASS_DRIVER, cir, "ir"); 265 266 #ifdef _MODULE 267 #include "ioconf.c" 268 #endif 269 270 static int 271 cir_modcmd(modcmd_t cmd, void *opaque) 272 { 273 int error = 0; 274 #ifdef _MODULE 275 int bmaj = -1, cmaj = -1; 276 #endif 277 278 switch (cmd) { 279 case MODULE_CMD_INIT: 280 #ifdef _MODULE 281 error = config_init_component(cfdriver_ioconf_cir, 282 cfattach_ioconf_cir, cfdata_ioconf_cir); 283 if (error) 284 return error; 285 error = devsw_attach("cir", NULL, &bmaj, &cir_cdevsw, &cmaj); 286 if (error) 287 config_fini_component(cfdriver_ioconf_cir, 288 cfattach_ioconf_cir, cfdata_ioconf_cir); 289 #endif 290 return error; 291 case MODULE_CMD_FINI: 292 #ifdef _MODULE 293 devsw_detach(NULL, &cir_cdevsw); 294 return config_fini_component(cfdriver_ioconf_cir, 295 cfattach_ioconf_cir, cfdata_ioconf_cir); 296 #endif 297 return error; 298 default: 299 return ENOTTY; 300 } 301 } 302
Indexes created Fri Oct 03 02:09:57 GMT 2025