1 /* $NetBSD: cir.c,v 1.33 2022/03/31 19:30:16 pgoyette 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 1.33 2022/03/31 19:30:16 pgoyette 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_discard = nodiscard, 69 .d_flag = D_OTHER 70 }; 71 72 int cir_match(device_t parent, cfdata_t match, void *aux); 73 void cir_attach(device_t parent, device_t self, void *aux); 74 int cir_detach(device_t self, int flags); 75 76 CFATTACH_DECL_NEW(cir, sizeof(struct cir_softc), 77 cir_match, cir_attach, cir_detach, NULL); 78 79 extern struct cfdriver cir_cd; 80 81 #define CIRUNIT(dev) (minor(dev)) 82 83 int 84 cir_match(device_t parent, cfdata_t match, void *aux) 85 { 86 struct ir_attach_args *ia = aux; 87 88 return (ia->ia_type == IR_TYPE_CIR); 89 } 90 91 void 92 cir_attach(device_t parent, device_t self, void *aux) 93 { 94 struct cir_softc *sc = device_private(self); 95 struct ir_attach_args *ia = aux; 96 97 sc->sc_dev = self; 98 99 selinit(&sc->sc_rdsel); 100 sc->sc_methods = ia->ia_methods; 101 sc->sc_handle = ia->ia_handle; 102 103 #ifdef DIAGNOSTIC 104 if (sc->sc_methods->im_read == NULL || 105 sc->sc_methods->im_write == NULL || 106 sc->sc_methods->im_setparams == NULL) 107 panic("%s: missing methods", device_xname(sc->sc_dev)); 108 #endif 109 aprint_naive("\n"); 110 aprint_normal("\n"); 111 } 112 113 int 114 cir_detach(device_t self, int flags) 115 { 116 struct cir_softc *sc = device_private(self); 117 int maj, mn; 118 119 /* locate the major number */ 120 maj = cdevsw_lookup_major(&cir_cdevsw); 121 122 /* Nuke the vnodes for any open instances (calls close). */ 123 mn = device_unit(self); 124 vdevgone(maj, mn, mn, VCHR); 125 126 seldestroy(&sc->sc_rdsel); 127 128 return (0); 129 } 130 131 int 132 ciropen(dev_t dev, int flag, int mode, struct lwp *l) 133 { 134 struct cir_softc *sc; 135 int error; 136 137 sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); 138 if (sc == NULL) 139 return (ENXIO); 140 if (!device_is_active(sc->sc_dev)) 141 return (EIO); 142 if (sc->sc_open) 143 return (EBUSY); 144 145 sc->sc_rdframes = 0; 146 if (sc->sc_methods->im_open != NULL) { 147 error = sc->sc_methods->im_open(sc->sc_handle, flag, mode, 148 l->l_proc); 149 if (error) 150 return (error); 151 } 152 sc->sc_open = 1; 153 return (0); 154 } 155 156 int 157 circlose(dev_t dev, int flag, int mode, struct lwp *l) 158 { 159 struct cir_softc *sc; 160 int error; 161 162 sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); 163 if (sc == NULL) 164 return (ENXIO); 165 if (sc->sc_methods->im_close != NULL) 166 error = sc->sc_methods->im_close(sc->sc_handle, flag, mode, 167 l->l_proc); 168 else 169 error = 0; 170 sc->sc_open = 0; 171 return (error); 172 } 173 174 int 175 cirread(dev_t dev, struct uio *uio, int flag) 176 { 177 struct cir_softc *sc; 178 179 sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); 180 if (sc == NULL) 181 return (ENXIO); 182 if (!device_is_active(sc->sc_dev)) 183 return (EIO); 184 return (sc->sc_methods->im_read(sc->sc_handle, uio, flag)); 185 } 186 187 int 188 cirwrite(dev_t dev, struct uio *uio, int flag) 189 { 190 struct cir_softc *sc; 191 192 sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); 193 if (sc == NULL) 194 return (ENXIO); 195 if (!device_is_active(sc->sc_dev)) 196 return (EIO); 197 return (sc->sc_methods->im_write(sc->sc_handle, uio, flag)); 198 } 199 200 int 201 cirioctl(dev_t dev, u_long cmd, void *addr, int flag, struct lwp *l) 202 { 203 struct cir_softc *sc; 204 int error; 205 206 sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); 207 if (sc == NULL) 208 return (ENXIO); 209 if (!device_is_active(sc->sc_dev)) 210 return (EIO); 211 212 switch (cmd) { 213 case FIONBIO: 214 /* All handled in the upper FS layer. */ 215 error = 0; 216 break; 217 case CIR_GET_PARAMS: 218 *(struct cir_params *)addr = sc->sc_params; 219 error = 0; 220 break; 221 case CIR_SET_PARAMS: 222 error = sc->sc_methods->im_setparams(sc->sc_handle, 223 (struct cir_params *)addr); 224 if (!error) 225 sc->sc_params = *(struct cir_params *)addr; 226 break; 227 default: 228 error = EINVAL; 229 break; 230 } 231 return (error); 232 } 233 234 int 235 cirpoll(dev_t dev, int events, struct lwp *l) 236 { 237 struct cir_softc *sc; 238 int revents; 239 int s; 240 241 sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); 242 if (sc == NULL) 243 return (POLLERR); 244 if (!device_is_active(sc->sc_dev)) 245 return (POLLERR); 246 247 revents = 0; 248 s = splir(); 249 if (events & (POLLIN | POLLRDNORM)) 250 if (sc->sc_rdframes > 0) 251 revents |= events & (POLLIN | POLLRDNORM); 252 253 #if 0 254 /* How about write? */ 255 if (events & (POLLOUT | POLLWRNORM)) 256 if (/* ??? */) 257 revents |= events & (POLLOUT | POLLWRNORM); 258 #endif 259 260 if (revents == 0) { 261 if (events & (POLLIN | POLLRDNORM)) 262 selrecord(l, &sc->sc_rdsel); 263 264 #if 0 265 if (events & (POLLOUT | POLLWRNORM)) 266 selrecord(p, &sc->sc_wrsel); 267 #endif 268 } 269 270 splx(s); 271 return (revents); 272 } 273 274 MODULE(MODULE_CLASS_DRIVER, cir, "ir"); 275 276 #ifdef _MODULE 277 #include "ioconf.c" 278 #endif 279 280 static int 281 cir_modcmd(modcmd_t cmd, void *opaque) 282 { 283 int error = 0; 284 #ifdef _MODULE 285 int bmaj = -1, cmaj = -1; 286 #endif 287 288 switch (cmd) { 289 case MODULE_CMD_INIT: 290 #ifdef _MODULE 291 error = devsw_attach("cir", NULL, &bmaj, &cir_cdevsw, &cmaj); 292 if (error) 293 return error; 294 error = config_init_component(cfdriver_ioconf_cir, 295 cfattach_ioconf_cir, cfdata_ioconf_cir); 296 if (error) 297 devsw_detach(NULL, &cir_cdevsw); 298 #endif 299 return error; 300 case MODULE_CMD_FINI: 301 #ifdef _MODULE 302 return config_fini_component(cfdriver_ioconf_cir, 303 cfattach_ioconf_cir, cfdata_ioconf_cir); 304 devsw_detach(NULL, &cir_cdevsw); 305 #endif 306 return error; 307 default: 308 return ENOTTY; 309 } 310 } 311
Indexes created Thu Oct 02 14:10:14 GMT 2025