1 /* $NetBSD: cir.c,v 1.28 2010/12/29 13:43:16 jmcneill 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 1.28 2010/12/29 13:43:16 jmcneill 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(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 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_detach(device_t self, int flags) 103 { 104 struct cir_softc *sc = device_private(self); 105 int maj, mn; 106 107 /* locate the major number */ 108 maj = cdevsw_lookup_major(&cir_cdevsw); 109 110 /* Nuke the vnodes for any open instances (calls close). */ 111 mn = device_unit(self); 112 vdevgone(maj, mn, mn, VCHR); 113 114 seldestroy(&sc->sc_rdsel); 115 116 return (0); 117 } 118 119 int 120 ciropen(dev_t dev, int flag, int mode, struct lwp *l) 121 { 122 struct cir_softc *sc; 123 int error; 124 125 sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); 126 if (sc == NULL) 127 return (ENXIO); 128 if (!device_is_active(&sc->sc_dev)) 129 return (EIO); 130 if (sc->sc_open) 131 return (EBUSY); 132 133 sc->sc_rdframes = 0; 134 if (sc->sc_methods->im_open != NULL) { 135 error = sc->sc_methods->im_open(sc->sc_handle, flag, mode, 136 l->l_proc); 137 if (error) 138 return (error); 139 } 140 sc->sc_open = 1; 141 return (0); 142 } 143 144 int 145 circlose(dev_t dev, int flag, int mode, struct lwp *l) 146 { 147 struct cir_softc *sc; 148 int error; 149 150 sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); 151 if (sc == NULL) 152 return (ENXIO); 153 if (sc->sc_methods->im_close != NULL) 154 error = sc->sc_methods->im_close(sc->sc_handle, flag, mode, 155 l->l_proc); 156 else 157 error = 0; 158 sc->sc_open = 0; 159 return (error); 160 } 161 162 int 163 cirread(dev_t dev, struct uio *uio, int flag) 164 { 165 struct cir_softc *sc; 166 167 sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); 168 if (sc == NULL) 169 return (ENXIO); 170 if (!device_is_active(&sc->sc_dev)) 171 return (EIO); 172 return (sc->sc_methods->im_read(sc->sc_handle, uio, flag)); 173 } 174 175 int 176 cirwrite(dev_t dev, struct uio *uio, int flag) 177 { 178 struct cir_softc *sc; 179 180 sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); 181 if (sc == NULL) 182 return (ENXIO); 183 if (!device_is_active(&sc->sc_dev)) 184 return (EIO); 185 return (sc->sc_methods->im_write(sc->sc_handle, uio, flag)); 186 } 187 188 int 189 cirioctl(dev_t dev, u_long cmd, void *addr, int flag, struct lwp *l) 190 { 191 struct cir_softc *sc; 192 int error; 193 194 sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); 195 if (sc == NULL) 196 return (ENXIO); 197 if (!device_is_active(&sc->sc_dev)) 198 return (EIO); 199 200 switch (cmd) { 201 case FIONBIO: 202 /* All handled in the upper FS layer. */ 203 error = 0; 204 break; 205 case CIR_GET_PARAMS: 206 *(struct cir_params *)addr = sc->sc_params; 207 error = 0; 208 break; 209 case CIR_SET_PARAMS: 210 error = sc->sc_methods->im_setparams(sc->sc_handle, 211 (struct cir_params *)addr); 212 if (!error) 213 sc->sc_params = *(struct cir_params *)addr; 214 break; 215 default: 216 error = EINVAL; 217 break; 218 } 219 return (error); 220 } 221 222 int 223 cirpoll(dev_t dev, int events, struct lwp *l) 224 { 225 struct cir_softc *sc; 226 int revents; 227 int s; 228 229 sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); 230 if (sc == NULL) 231 return (POLLERR); 232 if (!device_is_active(&sc->sc_dev)) 233 return (POLLERR); 234 235 revents = 0; 236 s = splir(); 237 if (events & (POLLIN | POLLRDNORM)) 238 if (sc->sc_rdframes > 0) 239 revents |= events & (POLLIN | POLLRDNORM); 240 241 #if 0 242 /* How about write? */ 243 if (events & (POLLOUT | POLLWRNORM)) 244 if (/* ??? */) 245 revents |= events & (POLLOUT | POLLWRNORM); 246 #endif 247 248 if (revents == 0) { 249 if (events & (POLLIN | POLLRDNORM)) 250 selrecord(l, &sc->sc_rdsel); 251 252 #if 0 253 if (events & (POLLOUT | POLLWRNORM)) 254 selrecord(p, &sc->sc_wrsel); 255 #endif 256 } 257 258 splx(s); 259 return (revents); 260 } 261 262 MODULE(MODULE_CLASS_DRIVER, cir, "ir"); 263 264 #ifdef _MODULE 265 #include "ioconf.c" 266 #endif 267 268 static int 269 cir_modcmd(modcmd_t cmd, void *opaque) 270 { 271 int error = 0; 272 #ifdef _MODULE 273 int bmaj = -1, cmaj = -1; 274 #endif 275 276 switch (cmd) { 277 case MODULE_CMD_INIT: 278 #ifdef _MODULE 279 error = config_init_component(cfdriver_ioconf_cir, 280 cfattach_ioconf_cir, cfdata_ioconf_cir); 281 if (error) 282 return error; 283 error = devsw_attach("cir", NULL, &bmaj, &cir_cdevsw, &cmaj); 284 if (error) 285 config_fini_component(cfdriver_ioconf_cir, 286 cfattach_ioconf_cir, cfdata_ioconf_cir); 287 #endif 288 return error; 289 case MODULE_CMD_FINI: 290 #ifdef _MODULE 291 devsw_detach(NULL, &cir_cdevsw); 292 return config_fini_component(cfdriver_ioconf_cir, 293 cfattach_ioconf_cir, cfdata_ioconf_cir); 294 #endif 295 return error; 296 default: 297 return ENOTTY; 298 } 299 } 300