1 /* $NetBSD: cir.c,v 1.31 2014/07/25 08:10:37 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@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 1.31 2014/07/25 08:10:37 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_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 printf("\n"); 110 } 111 112 int 113 cir_detach(device_t self, int flags) 114 { 115 struct cir_softc *sc = device_private(self); 116 int maj, mn; 117 118 /* locate the major number */ 119 maj = cdevsw_lookup_major(&cir_cdevsw); 120 121 /* Nuke the vnodes for any open instances (calls close). */ 122 mn = device_unit(self); 123 vdevgone(maj, mn, mn, VCHR); 124 125 seldestroy(&sc->sc_rdsel); 126 127 return (0); 128 } 129 130 int 131 ciropen(dev_t dev, int flag, int mode, struct lwp *l) 132 { 133 struct cir_softc *sc; 134 int error; 135 136 sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); 137 if (sc == NULL) 138 return (ENXIO); 139 if (!device_is_active(sc->sc_dev)) 140 return (EIO); 141 if (sc->sc_open) 142 return (EBUSY); 143 144 sc->sc_rdframes = 0; 145 if (sc->sc_methods->im_open != NULL) { 146 error = sc->sc_methods->im_open(sc->sc_handle, flag, mode, 147 l->l_proc); 148 if (error) 149 return (error); 150 } 151 sc->sc_open = 1; 152 return (0); 153 } 154 155 int 156 circlose(dev_t dev, int flag, int mode, struct lwp *l) 157 { 158 struct cir_softc *sc; 159 int error; 160 161 sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); 162 if (sc == NULL) 163 return (ENXIO); 164 if (sc->sc_methods->im_close != NULL) 165 error = sc->sc_methods->im_close(sc->sc_handle, flag, mode, 166 l->l_proc); 167 else 168 error = 0; 169 sc->sc_open = 0; 170 return (error); 171 } 172 173 int 174 cirread(dev_t dev, struct uio *uio, int flag) 175 { 176 struct cir_softc *sc; 177 178 sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); 179 if (sc == NULL) 180 return (ENXIO); 181 if (!device_is_active(sc->sc_dev)) 182 return (EIO); 183 return (sc->sc_methods->im_read(sc->sc_handle, uio, flag)); 184 } 185 186 int 187 cirwrite(dev_t dev, struct uio *uio, int flag) 188 { 189 struct cir_softc *sc; 190 191 sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); 192 if (sc == NULL) 193 return (ENXIO); 194 if (!device_is_active(sc->sc_dev)) 195 return (EIO); 196 return (sc->sc_methods->im_write(sc->sc_handle, uio, flag)); 197 } 198 199 int 200 cirioctl(dev_t dev, u_long cmd, void *addr, int flag, struct lwp *l) 201 { 202 struct cir_softc *sc; 203 int error; 204 205 sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); 206 if (sc == NULL) 207 return (ENXIO); 208 if (!device_is_active(sc->sc_dev)) 209 return (EIO); 210 211 switch (cmd) { 212 case FIONBIO: 213 /* All handled in the upper FS layer. */ 214 error = 0; 215 break; 216 case CIR_GET_PARAMS: 217 *(struct cir_params *)addr = sc->sc_params; 218 error = 0; 219 break; 220 case CIR_SET_PARAMS: 221 error = sc->sc_methods->im_setparams(sc->sc_handle, 222 (struct cir_params *)addr); 223 if (!error) 224 sc->sc_params = *(struct cir_params *)addr; 225 break; 226 default: 227 error = EINVAL; 228 break; 229 } 230 return (error); 231 } 232 233 int 234 cirpoll(dev_t dev, int events, struct lwp *l) 235 { 236 struct cir_softc *sc; 237 int revents; 238 int s; 239 240 sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); 241 if (sc == NULL) 242 return (POLLERR); 243 if (!device_is_active(sc->sc_dev)) 244 return (POLLERR); 245 246 revents = 0; 247 s = splir(); 248 if (events & (POLLIN | POLLRDNORM)) 249 if (sc->sc_rdframes > 0) 250 revents |= events & (POLLIN | POLLRDNORM); 251 252 #if 0 253 /* How about write? */ 254 if (events & (POLLOUT | POLLWRNORM)) 255 if (/* ??? */) 256 revents |= events & (POLLOUT | POLLWRNORM); 257 #endif 258 259 if (revents == 0) { 260 if (events & (POLLIN | POLLRDNORM)) 261 selrecord(l, &sc->sc_rdsel); 262 263 #if 0 264 if (events & (POLLOUT | POLLWRNORM)) 265 selrecord(p, &sc->sc_wrsel); 266 #endif 267 } 268 269 splx(s); 270 return (revents); 271 } 272 273 MODULE(MODULE_CLASS_DRIVER, cir, "ir"); 274 275 #ifdef _MODULE 276 #include "ioconf.c" 277 #endif 278 279 static int 280 cir_modcmd(modcmd_t cmd, void *opaque) 281 { 282 int error = 0; 283 #ifdef _MODULE 284 int bmaj = -1, cmaj = -1; 285 #endif 286 287 switch (cmd) { 288 case MODULE_CMD_INIT: 289 #ifdef _MODULE 290 error = config_init_component(cfdriver_ioconf_cir, 291 cfattach_ioconf_cir, cfdata_ioconf_cir); 292 if (error) 293 return error; 294 error = devsw_attach("cir", NULL, &bmaj, &cir_cdevsw, &cmaj); 295 if (error) 296 config_fini_component(cfdriver_ioconf_cir, 297 cfattach_ioconf_cir, cfdata_ioconf_cir); 298 #endif 299 return error; 300 case MODULE_CMD_FINI: 301 #ifdef _MODULE 302 devsw_detach(NULL, &cir_cdevsw); 303 return config_fini_component(cfdriver_ioconf_cir, 304 cfattach_ioconf_cir, cfdata_ioconf_cir); 305 #endif 306 return error; 307 default: 308 return ENOTTY; 309 } 310 } 311