cir.c revision 1.30
1 /* $NetBSD: cir.c,v 1.30 2014/03/16 05:20:28 dholland 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 1.30 2014/03/16 05:20:28 dholland 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 .d_open = ciropen, 59 .d_close = circlose, 60 .d_read = cirread, 61 .d_write = cirwrite, 62 .d_ioctl = cirioctl, 63 .d_stop = nostop, 64 .d_tty = notty, 65 .d_poll = cirpoll, 66 .d_mmap = nommap, 67 .d_kqfilter = nokqfilter, 68 .d_flag = D_OTHER 69 }; 70 71 int cir_match(device_t parent, cfdata_t match, void *aux); 72 void cir_attach(device_t parent, device_t self, void *aux); 73 int cir_detach(device_t self, int flags); 74 75 CFATTACH_DECL_NEW(cir, sizeof(struct cir_softc), 76 cir_match, cir_attach, cir_detach, NULL); 77 78 extern struct cfdriver cir_cd; 79 80 #define CIRUNIT(dev) (minor(dev)) 81 82 int 83 cir_match(device_t parent, cfdata_t 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(device_t parent, device_t self, void *aux) 92 { 93 struct cir_softc *sc = device_private(self); 94 struct ir_attach_args *ia = aux; 95 96 sc->sc_dev = self; 97 98 selinit(&sc->sc_rdsel); 99 sc->sc_methods = ia->ia_methods; 100 sc->sc_handle = ia->ia_handle; 101 102 #ifdef DIAGNOSTIC 103 if (sc->sc_methods->im_read == NULL || 104 sc->sc_methods->im_write == NULL || 105 sc->sc_methods->im_setparams == NULL) 106 panic("%s: missing methods", device_xname(sc->sc_dev)); 107 #endif 108 printf("\n"); 109 } 110 111 int 112 cir_detach(device_t self, int flags) 113 { 114 struct cir_softc *sc = device_private(self); 115 int maj, mn; 116 117 /* locate the major number */ 118 maj = cdevsw_lookup_major(&cir_cdevsw); 119 120 /* Nuke the vnodes for any open instances (calls close). */ 121 mn = device_unit(self); 122 vdevgone(maj, mn, mn, VCHR); 123 124 seldestroy(&sc->sc_rdsel); 125 126 return (0); 127 } 128 129 int 130 ciropen(dev_t dev, int flag, int mode, struct lwp *l) 131 { 132 struct cir_softc *sc; 133 int error; 134 135 sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); 136 if (sc == NULL) 137 return (ENXIO); 138 if (!device_is_active(sc->sc_dev)) 139 return (EIO); 140 if (sc->sc_open) 141 return (EBUSY); 142 143 sc->sc_rdframes = 0; 144 if (sc->sc_methods->im_open != NULL) { 145 error = sc->sc_methods->im_open(sc->sc_handle, flag, mode, 146 l->l_proc); 147 if (error) 148 return (error); 149 } 150 sc->sc_open = 1; 151 return (0); 152 } 153 154 int 155 circlose(dev_t dev, int flag, int mode, struct lwp *l) 156 { 157 struct cir_softc *sc; 158 int error; 159 160 sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); 161 if (sc == NULL) 162 return (ENXIO); 163 if (sc->sc_methods->im_close != NULL) 164 error = sc->sc_methods->im_close(sc->sc_handle, flag, mode, 165 l->l_proc); 166 else 167 error = 0; 168 sc->sc_open = 0; 169 return (error); 170 } 171 172 int 173 cirread(dev_t dev, struct uio *uio, int flag) 174 { 175 struct cir_softc *sc; 176 177 sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); 178 if (sc == NULL) 179 return (ENXIO); 180 if (!device_is_active(sc->sc_dev)) 181 return (EIO); 182 return (sc->sc_methods->im_read(sc->sc_handle, uio, flag)); 183 } 184 185 int 186 cirwrite(dev_t dev, struct uio *uio, int flag) 187 { 188 struct cir_softc *sc; 189 190 sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); 191 if (sc == NULL) 192 return (ENXIO); 193 if (!device_is_active(sc->sc_dev)) 194 return (EIO); 195 return (sc->sc_methods->im_write(sc->sc_handle, uio, flag)); 196 } 197 198 int 199 cirioctl(dev_t dev, u_long cmd, void *addr, int flag, struct lwp *l) 200 { 201 struct cir_softc *sc; 202 int error; 203 204 sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); 205 if (sc == NULL) 206 return (ENXIO); 207 if (!device_is_active(sc->sc_dev)) 208 return (EIO); 209 210 switch (cmd) { 211 case FIONBIO: 212 /* All handled in the upper FS layer. */ 213 error = 0; 214 break; 215 case CIR_GET_PARAMS: 216 *(struct cir_params *)addr = sc->sc_params; 217 error = 0; 218 break; 219 case CIR_SET_PARAMS: 220 error = sc->sc_methods->im_setparams(sc->sc_handle, 221 (struct cir_params *)addr); 222 if (!error) 223 sc->sc_params = *(struct cir_params *)addr; 224 break; 225 default: 226 error = EINVAL; 227 break; 228 } 229 return (error); 230 } 231 232 int 233 cirpoll(dev_t dev, int events, struct lwp *l) 234 { 235 struct cir_softc *sc; 236 int revents; 237 int s; 238 239 sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); 240 if (sc == NULL) 241 return (POLLERR); 242 if (!device_is_active(sc->sc_dev)) 243 return (POLLERR); 244 245 revents = 0; 246 s = splir(); 247 if (events & (POLLIN | POLLRDNORM)) 248 if (sc->sc_rdframes > 0) 249 revents |= events & (POLLIN | POLLRDNORM); 250 251 #if 0 252 /* How about write? */ 253 if (events & (POLLOUT | POLLWRNORM)) 254 if (/* ??? */) 255 revents |= events & (POLLOUT | POLLWRNORM); 256 #endif 257 258 if (revents == 0) { 259 if (events & (POLLIN | POLLRDNORM)) 260 selrecord(l, &sc->sc_rdsel); 261 262 #if 0 263 if (events & (POLLOUT | POLLWRNORM)) 264 selrecord(p, &sc->sc_wrsel); 265 #endif 266 } 267 268 splx(s); 269 return (revents); 270 } 271 272 MODULE(MODULE_CLASS_DRIVER, cir, "ir"); 273 274 #ifdef _MODULE 275 #include "ioconf.c" 276 #endif 277 278 static int 279 cir_modcmd(modcmd_t cmd, void *opaque) 280 { 281 int error = 0; 282 #ifdef _MODULE 283 int bmaj = -1, cmaj = -1; 284 #endif 285 286 switch (cmd) { 287 case MODULE_CMD_INIT: 288 #ifdef _MODULE 289 error = config_init_component(cfdriver_ioconf_cir, 290 cfattach_ioconf_cir, cfdata_ioconf_cir); 291 if (error) 292 return error; 293 error = devsw_attach("cir", NULL, &bmaj, &cir_cdevsw, &cmaj); 294 if (error) 295 config_fini_component(cfdriver_ioconf_cir, 296 cfattach_ioconf_cir, cfdata_ioconf_cir); 297 #endif 298 return error; 299 case MODULE_CMD_FINI: 300 #ifdef _MODULE 301 devsw_detach(NULL, &cir_cdevsw); 302 return config_fini_component(cfdriver_ioconf_cir, 303 cfattach_ioconf_cir, cfdata_ioconf_cir); 304 #endif 305 return error; 306 default: 307 return ENOTTY; 308 } 309 } 310
Indexes created Fri Oct 03 02:09:57 GMT 2025