cir.c

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    1 /*      $NetBSD: cir.c,v 1.9 2003/07/14 15:47:14 lukem 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/cdefs.h>
   40 __KERNEL_RCSID(0, "$NetBSD: cir.c,v 1.9 2003/07/14 15:47:14 lukem Exp $");
   41 
   42 #include <sys/param.h>
   43 #include <sys/systm.h>
   44 #include <sys/ioctl.h>
   45 #include <sys/kernel.h>
   46 #include <sys/device.h>
   47 #include <sys/conf.h>
   48 #include <sys/poll.h>
   49 #include <sys/select.h>
   50 #include <sys/vnode.h>
   51 
   52 #include <dev/ir/ir.h>
   53 #include <dev/ir/cirio.h>
   54 #include <dev/ir/cirvar.h>
   55 
   56 dev_type_open(ciropen);
   57 dev_type_close(circlose);
   58 dev_type_read(cirread);
   59 dev_type_write(cirwrite);
   60 dev_type_ioctl(cirioctl);
   61 dev_type_poll(cirpoll);
   62 dev_type_kqfilter(cirkqfilter);
   63 
   64 const struct cdevsw cir_cdevsw = {
   65         ciropen, circlose, cirread, cirwrite, cirioctl,
   66         nostop, notty, cirpoll, nommap, cirkqfilter,
   67 };
   68 
   69 int cir_match(struct device *parent, struct cfdata *match, void *aux);
   70 void cir_attach(struct device *parent, struct device *self, void *aux);
   71 int cir_activate(struct device *self, enum devact act);
   72 int cir_detach(struct device *self, int flags);
   73 
   74 CFATTACH_DECL(cir, sizeof(struct cir_softc),
   75     cir_match, cir_attach, cir_detach, cir_activate);
   76 
   77 extern struct cfdriver cir_cd;
   78 
   79 #define CIRUNIT(dev) (minor(dev))
   80 
   81 int
   82 cir_match(struct device *parent, struct cfdata *match, void *aux)
   83 {
   84         struct ir_attach_args *ia = aux;
   85 
   86         return (ia->ia_type == IR_TYPE_CIR);
   87 }
   88 
   89 void
   90 cir_attach(struct device *parent, struct device *self, void *aux)
   91 {
   92         struct cir_softc *sc = (struct cir_softc *)self;
   93         struct ir_attach_args *ia = aux;
   94 
   95         sc->sc_methods = ia->ia_methods;
   96         sc->sc_handle = ia->ia_handle;
   97 
   98 #ifdef DIAGNOSTIC
   99         if (sc->sc_methods->im_read == NULL ||
  100             sc->sc_methods->im_write == NULL ||
  101             sc->sc_methods->im_setparams == NULL)
  102                 panic("%s: missing methods", sc->sc_dev.dv_xname);
  103 #endif
  104         printf("\n");
  105 }
  106 
  107 int
  108 cir_activate(struct device *self, enum devact act)
  109 {
  110         /*struct cir_softc *sc = (struct cir_softc *)self;*/
  111 
  112         switch (act) {
  113         case DVACT_ACTIVATE:
  114                 return (EOPNOTSUPP);
  115                 break;
  116 
  117         case DVACT_DEACTIVATE:
  118                 break;
  119         }
  120         return (0);
  121 }
  122 
  123 int
  124 cir_detach(struct device *self, int flags)
  125 {
  126         /*struct cir_softc *sc = (struct cir_softc *)self;*/
  127         int maj, mn;
  128 
  129         /* locate the major number */
  130         maj = cdevsw_lookup_major(&cir_cdevsw);
  131 
  132         /* Nuke the vnodes for any open instances (calls close). */
  133         mn = self->dv_unit;
  134         vdevgone(maj, mn, mn, VCHR);
  135 
  136         return (0);
  137 }
  138 
  139 int
  140 ciropen(dev_t dev, int flag, int mode, struct proc *p)
  141 {
  142         struct cir_softc *sc;
  143         int error;
  144 
  145         sc = device_lookup(&cir_cd, CIRUNIT(dev));
  146         if (sc == NULL)
  147                 return (ENXIO);
  148         if ((sc->sc_dev.dv_flags & DVF_ACTIVE) == 0)
  149                 return (EIO);
  150         if (sc->sc_open)
  151                 return (EBUSY);
  152         if (sc->sc_methods->im_open != NULL) {
  153                 error = sc->sc_methods->im_open(sc->sc_handle, flag, mode, p);
  154                 if (error)
  155                         return (error);
  156         }
  157         sc->sc_open = 1;
  158         return (0);
  159 }
  160 
  161 int
  162 circlose(dev_t dev, int flag, int mode, struct proc *p)
  163 {
  164         struct cir_softc *sc;
  165         int error;
  166 
  167         sc = device_lookup(&cir_cd, CIRUNIT(dev));
  168         if (sc == NULL)
  169                 return (ENXIO);
  170         if (sc->sc_methods->im_close != NULL)
  171                 error = sc->sc_methods->im_close(sc->sc_handle, flag, mode, p);
  172         else
  173                 error = 0;
  174         sc->sc_open = 0;
  175         return (error);
  176 }
  177 
  178 int
  179 cirread(dev_t dev, struct uio *uio, int flag)
  180 {
  181         struct cir_softc *sc;
  182 
  183         sc = device_lookup(&cir_cd, CIRUNIT(dev));
  184         if (sc == NULL)
  185                 return (ENXIO);
  186         if ((sc->sc_dev.dv_flags & DVF_ACTIVE) == 0)
  187                 return (EIO);
  188         return (sc->sc_methods->im_read(sc->sc_handle, uio, flag));
  189 }
  190 
  191 int
  192 cirwrite(dev_t dev, struct uio *uio, int flag)
  193 {
  194         struct cir_softc *sc;
  195 
  196         sc = device_lookup(&cir_cd, CIRUNIT(dev));
  197         if (sc == NULL)
  198                 return (ENXIO);
  199         if ((sc->sc_dev.dv_flags & DVF_ACTIVE) == 0)
  200                 return (EIO);
  201         return (sc->sc_methods->im_write(sc->sc_handle, uio, flag));
  202 }
  203 
  204 int
  205 cirioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p)
  206 {
  207         struct cir_softc *sc;
  208         int error;
  209 
  210         sc = device_lookup(&cir_cd, CIRUNIT(dev));
  211         if (sc == NULL)
  212                 return (ENXIO);
  213         if ((sc->sc_dev.dv_flags & DVF_ACTIVE) == 0)
  214                 return (EIO);
  215 
  216         switch (cmd) {
  217         case FIONBIO:
  218                 /* All handled in the upper FS layer. */
  219                 error = 0;
  220                 break;
  221         case CIR_GET_PARAMS:
  222                 *(struct cir_params *)addr = sc->sc_params;
  223                 break;
  224         case CIR_SET_PARAMS:
  225                 error = sc->sc_methods->im_setparams(sc->sc_handle,
  226                             (struct cir_params *)addr);
  227                 if (!error)
  228                         sc->sc_params = *(struct cir_params *)addr;
  229                 break;
  230         default:
  231                 error = EINVAL;
  232                 break;
  233         }
  234         return (error);
  235 }
  236 
  237 int
  238 cirpoll(dev_t dev, int events, struct proc *p)
  239 {
  240         struct cir_softc *sc;
  241         int revents;
  242         int s;
  243 
  244         sc = device_lookup(&cir_cd, CIRUNIT(dev));
  245         if (sc == NULL)
  246                 return (ENXIO);
  247         if ((sc->sc_dev.dv_flags & DVF_ACTIVE) == 0)
  248                 return (EIO);
  249 
  250         revents = 0;
  251         s = splir();
  252 #if 0
  253         if (events & (POLLIN | POLLRDNORM))
  254                 if (sc->sc_rdframes > 0)
  255                         revents |= events & (POLLIN | POLLRDNORM);
  256 #endif
  257 
  258 #if 0
  259         /* How about write? */
  260         if (events & (POLLOUT | POLLWRNORM))
  261                 if (???)
  262                         revents |= events & (POLLOUT | POLLWRNORM);
  263 #endif
  264 
  265         if (revents == 0) {
  266                 if (events & (POLLIN | POLLRDNORM))
  267                         selrecord(p, &sc->sc_rdsel);
  268 
  269 #if 0
  270                 if (events & (POLLOUT | POLLWRNORM))
  271                         selrecord(p, &sc->sc_wrsel);
  272 #endif
  273         }
  274 
  275         splx(s);
  276         return (revents);
  277 }

Cache object: 204bced0206bda9fde7d99b28884f6d9

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FreeBSD/Linux Kernel Cross Reference sys/dev/ir/cir.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/ir/cir.c