1 /* $NetBSD: cir.c,v 1.8 2002/10/23 09:13:20 jdolecek 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/ioctl.h> 42 #include <sys/kernel.h> 43 #include <sys/device.h> 44 #include <sys/conf.h> 45 #include <sys/poll.h> 46 #include <sys/select.h> 47 #include <sys/vnode.h> 48 49 #include <dev/ir/ir.h> 50 #include <dev/ir/cirio.h> 51 #include <dev/ir/cirvar.h> 52 53 dev_type_open(ciropen); 54 dev_type_close(circlose); 55 dev_type_read(cirread); 56 dev_type_write(cirwrite); 57 dev_type_ioctl(cirioctl); 58 dev_type_poll(cirpoll); 59 dev_type_kqfilter(cirkqfilter); 60 61 const struct cdevsw cir_cdevsw = { 62 ciropen, circlose, cirread, cirwrite, cirioctl, 63 nostop, notty, cirpoll, nommap, cirkqfilter, 64 }; 65 66 int cir_match(struct device *parent, struct cfdata *match, void *aux); 67 void cir_attach(struct device *parent, struct device *self, void *aux); 68 int cir_activate(struct device *self, enum devact act); 69 int cir_detach(struct device *self, int flags); 70 71 CFATTACH_DECL(cir, sizeof(struct cir_softc), 72 cir_match, cir_attach, cir_detach, cir_activate); 73 74 extern struct cfdriver cir_cd; 75 76 #define CIRUNIT(dev) (minor(dev)) 77 78 int 79 cir_match(struct device *parent, struct cfdata *match, void *aux) 80 { 81 struct ir_attach_args *ia = aux; 82 83 return (ia->ia_type == IR_TYPE_CIR); 84 } 85 86 void 87 cir_attach(struct device *parent, struct device *self, void *aux) 88 { 89 struct cir_softc *sc = (struct cir_softc *)self; 90 struct ir_attach_args *ia = aux; 91 92 sc->sc_methods = ia->ia_methods; 93 sc->sc_handle = ia->ia_handle; 94 95 #ifdef DIAGNOSTIC 96 if (sc->sc_methods->im_read == NULL || 97 sc->sc_methods->im_write == NULL || 98 sc->sc_methods->im_setparams == NULL) 99 panic("%s: missing methods", sc->sc_dev.dv_xname); 100 #endif 101 printf("\n"); 102 } 103 104 int 105 cir_activate(struct device *self, enum devact act) 106 { 107 /*struct cir_softc *sc = (struct cir_softc *)self;*/ 108 109 switch (act) { 110 case DVACT_ACTIVATE: 111 return (EOPNOTSUPP); 112 break; 113 114 case DVACT_DEACTIVATE: 115 break; 116 } 117 return (0); 118 } 119 120 int 121 cir_detach(struct device *self, int flags) 122 { 123 /*struct cir_softc *sc = (struct cir_softc *)self;*/ 124 int maj, mn; 125 126 /* locate the major number */ 127 maj = cdevsw_lookup_major(&cir_cdevsw); 128 129 /* Nuke the vnodes for any open instances (calls close). */ 130 mn = self->dv_unit; 131 vdevgone(maj, mn, mn, VCHR); 132 133 return (0); 134 } 135 136 int 137 ciropen(dev_t dev, int flag, int mode, struct proc *p) 138 { 139 struct cir_softc *sc; 140 int error; 141 142 sc = device_lookup(&cir_cd, CIRUNIT(dev)); 143 if (sc == NULL) 144 return (ENXIO); 145 if ((sc->sc_dev.dv_flags & DVF_ACTIVE) == 0) 146 return (EIO); 147 if (sc->sc_open) 148 return (EBUSY); 149 if (sc->sc_methods->im_open != NULL) { 150 error = sc->sc_methods->im_open(sc->sc_handle, flag, mode, p); 151 if (error) 152 return (error); 153 } 154 sc->sc_open = 1; 155 return (0); 156 } 157 158 int 159 circlose(dev_t dev, int flag, int mode, struct proc *p) 160 { 161 struct cir_softc *sc; 162 int error; 163 164 sc = device_lookup(&cir_cd, CIRUNIT(dev)); 165 if (sc == NULL) 166 return (ENXIO); 167 if (sc->sc_methods->im_close != NULL) 168 error = sc->sc_methods->im_close(sc->sc_handle, flag, mode, p); 169 else 170 error = 0; 171 sc->sc_open = 0; 172 return (error); 173 } 174 175 int 176 cirread(dev_t dev, struct uio *uio, int flag) 177 { 178 struct cir_softc *sc; 179 180 sc = device_lookup(&cir_cd, CIRUNIT(dev)); 181 if (sc == NULL) 182 return (ENXIO); 183 if ((sc->sc_dev.dv_flags & DVF_ACTIVE) == 0) 184 return (EIO); 185 return (sc->sc_methods->im_read(sc->sc_handle, uio, flag)); 186 } 187 188 int 189 cirwrite(dev_t dev, struct uio *uio, int flag) 190 { 191 struct cir_softc *sc; 192 193 sc = device_lookup(&cir_cd, CIRUNIT(dev)); 194 if (sc == NULL) 195 return (ENXIO); 196 if ((sc->sc_dev.dv_flags & DVF_ACTIVE) == 0) 197 return (EIO); 198 return (sc->sc_methods->im_write(sc->sc_handle, uio, flag)); 199 } 200 201 int 202 cirioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p) 203 { 204 struct cir_softc *sc; 205 int error; 206 207 sc = device_lookup(&cir_cd, CIRUNIT(dev)); 208 if (sc == NULL) 209 return (ENXIO); 210 if ((sc->sc_dev.dv_flags & DVF_ACTIVE) == 0) 211 return (EIO); 212 213 switch (cmd) { 214 case FIONBIO: 215 /* All handled in the upper FS layer. */ 216 error = 0; 217 break; 218 case CIR_GET_PARAMS: 219 *(struct cir_params *)addr = sc->sc_params; 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 proc *p) 236 { 237 struct cir_softc *sc; 238 int revents; 239 int s; 240 241 sc = device_lookup(&cir_cd, CIRUNIT(dev)); 242 if (sc == NULL) 243 return (ENXIO); 244 if ((sc->sc_dev.dv_flags & DVF_ACTIVE) == 0) 245 return (EIO); 246 247 revents = 0; 248 s = splir(); 249 #if 0 250 if (events & (POLLIN | POLLRDNORM)) 251 if (sc->sc_rdframes > 0) 252 revents |= events & (POLLIN | POLLRDNORM); 253 #endif 254 255 #if 0 256 /* How about write? */ 257 if (events & (POLLOUT | POLLWRNORM)) 258 if (???) 259 revents |= events & (POLLOUT | POLLWRNORM); 260 #endif 261 262 if (revents == 0) { 263 if (events & (POLLIN | POLLRDNORM)) 264 selrecord(p, &sc->sc_rdsel); 265 266 #if 0 267 if (events & (POLLOUT | POLLWRNORM)) 268 selrecord(p, &sc->sc_wrsel); 269 #endif 270 } 271 272 splx(s); 273 return (revents); 274 } 275