cir.c revision 1.26
1 /* $NetBSD: cir.c,v 1.26 2009/12/06 22:40:56 dyoung 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 1.26 2009/12/06 22:40:56 dyoung 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 45 #include <dev/ir/ir.h> 46 #include <dev/ir/cirio.h> 47 #include <dev/ir/cirvar.h> 48 49 dev_type_open(ciropen); 50 dev_type_close(circlose); 51 dev_type_read(cirread); 52 dev_type_write(cirwrite); 53 dev_type_ioctl(cirioctl); 54 dev_type_poll(cirpoll); 55 56 const struct cdevsw cir_cdevsw = { 57 ciropen, circlose, cirread, cirwrite, cirioctl, 58 nostop, notty, cirpoll, nommap, nokqfilter, 59 D_OTHER 60 }; 61 62 int cir_match(device_t parent, cfdata_t match, void *aux); 63 void cir_attach(device_t parent, device_t self, void *aux); 64 int cir_detach(device_t self, int flags); 65 66 CFATTACH_DECL(cir, sizeof(struct cir_softc), 67 cir_match, cir_attach, cir_detach, NULL); 68 69 extern struct cfdriver cir_cd; 70 71 #define CIRUNIT(dev) (minor(dev)) 72 73 int 74 cir_match(device_t parent, cfdata_t match, void *aux) 75 { 76 struct ir_attach_args *ia = aux; 77 78 return (ia->ia_type == IR_TYPE_CIR); 79 } 80 81 void 82 cir_attach(device_t parent, device_t self, void *aux) 83 { 84 struct cir_softc *sc = device_private(self); 85 struct ir_attach_args *ia = aux; 86 87 selinit(&sc->sc_rdsel); 88 sc->sc_methods = ia->ia_methods; 89 sc->sc_handle = ia->ia_handle; 90 91 #ifdef DIAGNOSTIC 92 if (sc->sc_methods->im_read == NULL || 93 sc->sc_methods->im_write == NULL || 94 sc->sc_methods->im_setparams == NULL) 95 panic("%s: missing methods", device_xname(&sc->sc_dev)); 96 #endif 97 printf("\n"); 98 } 99 100 int 101 cir_detach(device_t self, int flags) 102 { 103 struct cir_softc *sc = device_private(self); 104 int maj, mn; 105 106 /* locate the major number */ 107 maj = cdevsw_lookup_major(&cir_cdevsw); 108 109 /* Nuke the vnodes for any open instances (calls close). */ 110 mn = device_unit(self); 111 vdevgone(maj, mn, mn, VCHR); 112 113 seldestroy(&sc->sc_rdsel); 114 115 return (0); 116 } 117 118 int 119 ciropen(dev_t dev, int flag, int mode, struct lwp *l) 120 { 121 struct cir_softc *sc; 122 int error; 123 124 sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); 125 if (sc == NULL) 126 return (ENXIO); 127 if (!device_is_active(&sc->sc_dev)) 128 return (EIO); 129 if (sc->sc_open) 130 return (EBUSY); 131 132 sc->sc_rdframes = 0; 133 if (sc->sc_methods->im_open != NULL) { 134 error = sc->sc_methods->im_open(sc->sc_handle, flag, mode, 135 l->l_proc); 136 if (error) 137 return (error); 138 } 139 sc->sc_open = 1; 140 return (0); 141 } 142 143 int 144 circlose(dev_t dev, int flag, int mode, struct lwp *l) 145 { 146 struct cir_softc *sc; 147 int error; 148 149 sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); 150 if (sc == NULL) 151 return (ENXIO); 152 if (sc->sc_methods->im_close != NULL) 153 error = sc->sc_methods->im_close(sc->sc_handle, flag, mode, 154 l->l_proc); 155 else 156 error = 0; 157 sc->sc_open = 0; 158 return (error); 159 } 160 161 int 162 cirread(dev_t dev, struct uio *uio, int flag) 163 { 164 struct cir_softc *sc; 165 166 sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); 167 if (sc == NULL) 168 return (ENXIO); 169 if (!device_is_active(&sc->sc_dev)) 170 return (EIO); 171 return (sc->sc_methods->im_read(sc->sc_handle, uio, flag)); 172 } 173 174 int 175 cirwrite(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_write(sc->sc_handle, uio, flag)); 185 } 186 187 int 188 cirioctl(dev_t dev, u_long cmd, void *addr, int flag, struct lwp *l) 189 { 190 struct cir_softc *sc; 191 int error; 192 193 sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); 194 if (sc == NULL) 195 return (ENXIO); 196 if (!device_is_active(&sc->sc_dev)) 197 return (EIO); 198 199 switch (cmd) { 200 case FIONBIO: 201 /* All handled in the upper FS layer. */ 202 error = 0; 203 break; 204 case CIR_GET_PARAMS: 205 *(struct cir_params *)addr = sc->sc_params; 206 error = 0; 207 break; 208 case CIR_SET_PARAMS: 209 error = sc->sc_methods->im_setparams(sc->sc_handle, 210 (struct cir_params *)addr); 211 if (!error) 212 sc->sc_params = *(struct cir_params *)addr; 213 break; 214 default: 215 error = EINVAL; 216 break; 217 } 218 return (error); 219 } 220 221 int 222 cirpoll(dev_t dev, int events, struct lwp *l) 223 { 224 struct cir_softc *sc; 225 int revents; 226 int s; 227 228 sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); 229 if (sc == NULL) 230 return (POLLERR); 231 if (!device_is_active(&sc->sc_dev)) 232 return (POLLERR); 233 234 revents = 0; 235 s = splir(); 236 if (events & (POLLIN | POLLRDNORM)) 237 if (sc->sc_rdframes > 0) 238 revents |= events & (POLLIN | POLLRDNORM); 239 240 #if 0 241 /* How about write? */ 242 if (events & (POLLOUT | POLLWRNORM)) 243 if (/* ??? */) 244 revents |= events & (POLLOUT | POLLWRNORM); 245 #endif 246 247 if (revents == 0) { 248 if (events & (POLLIN | POLLRDNORM)) 249 selrecord(l, &sc->sc_rdsel); 250 251 #if 0 252 if (events & (POLLOUT | POLLWRNORM)) 253 selrecord(p, &sc->sc_wrsel); 254 #endif 255 } 256 257 splx(s); 258 return (revents); 259 } 260
Indexes created Fri Oct 03 02:09:57 GMT 2025