cardbus_device.c

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    1 /*-
    2  * Copyright (c) 2005, M. Warner Losh
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice unmodified, this list of conditions, and the following
   10  *    disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   25  * SUCH DAMAGE.
   26  *
   27  */
   28 #include <sys/cdefs.h>
   29 __FBSDID("$FreeBSD$");
   30 
   31 #include <sys/param.h>
   32 #include <sys/conf.h>
   33 #include <sys/malloc.h>
   34 #include <sys/systm.h>
   35 #include <sys/uio.h>
   36 
   37 #include <sys/bus.h>
   38 #include <machine/bus.h>
   39 #include <sys/rman.h>
   40 #include <machine/resource.h>
   41 
   42 #include <sys/pciio.h>
   43 #include <dev/pci/pcivar.h>
   44 #include <dev/pci/pcireg.h>
   45 #include <dev/pci/pci_private.h>
   46 
   47 #include <dev/cardbus/cardbusreg.h>
   48 #include <dev/cardbus/cardbusvar.h>
   49 #include <dev/cardbus/cardbus_cis.h>
   50 #include <dev/pccard/pccard_cis.h>
   51 
   52 static  d_open_t        cardbus_open;
   53 static  d_close_t       cardbus_close;
   54 static  d_read_t        cardbus_read;
   55 static  d_ioctl_t       cardbus_ioctl;
   56 
   57 static struct cdevsw cardbus_cdevsw = {
   58         .d_version =    D_VERSION,
   59         .d_open =       cardbus_open,
   60         .d_close =      cardbus_close,
   61         .d_read =       cardbus_read,
   62         .d_ioctl =      cardbus_ioctl,
   63         .d_name =       "cardbus"
   64 };
   65 
   66 int
   67 cardbus_device_create(struct cardbus_softc *sc)
   68 {
   69         uint32_t minor;
   70 
   71         minor = device_get_unit(sc->sc_dev) << 16;
   72         sc->sc_cisdev = make_dev(&cardbus_cdevsw, minor, 0, 0, 0666,
   73             "cardbus%u.cis", device_get_unit(sc->sc_dev));
   74         sc->sc_cisdev->si_drv1 = sc;
   75         return (0);
   76 }
   77 
   78 int
   79 cardbus_device_destroy(struct cardbus_softc *sc)
   80 {
   81         if (sc->sc_cisdev)
   82                 destroy_dev(sc->sc_cisdev);
   83         return (0);
   84 }
   85 
   86 static int
   87 cardbus_build_cis(device_t cbdev, device_t child, int id,
   88     int len, uint8_t *tupledata, uint32_t start, uint32_t *off,
   89     struct tuple_callbacks *info, void *argp)
   90 {
   91         struct cis_buffer *cis;
   92         int i;
   93 
   94         cis = (struct cis_buffer *)argp;
   95         /*
   96          * CISTPL_END is a special case, it has no length field.
   97          */
   98         if (id == CISTPL_END) {
   99                 if (cis->len + 1 > sizeof(cis->buffer))
  100                         return (ENOSPC);
  101                 cis->buffer[cis->len++] = id;
  102                 return (0);
  103         }
  104         if (cis->len + 2 + len > sizeof(cis->buffer))
  105                 return (ENOSPC);
  106         cis->buffer[cis->len++] = id;
  107         cis->buffer[cis->len++] = len;
  108         for (i = 0; i < len; i++)
  109                 cis->buffer[cis->len++] = tupledata[i];
  110         return (0);
  111 }
  112 
  113 static  int
  114 cardbus_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
  115 {
  116         device_t parent, child;
  117         device_t *kids;
  118         int cnt, err;
  119         struct cardbus_softc *sc;
  120         struct tuple_callbacks cb[] = {
  121                 {CISTPL_GENERIC, "GENERIC", cardbus_build_cis}
  122         };
  123 
  124         sc = dev->si_drv1;
  125         if (sc->sc_cis_open)
  126                 return (EBUSY);
  127         parent = sc->sc_dev;
  128         err = device_get_children(parent, &kids, &cnt);
  129         if (err)
  130                 return err;
  131         if (cnt == 0) {
  132                 free(kids, M_TEMP);
  133                 sc->sc_cis_open++;
  134                 sc->sc_cis = NULL;
  135                 return (0);
  136         }
  137         child = kids[0];
  138         free(kids, M_TEMP);
  139         sc->sc_cis = malloc(sizeof(*sc->sc_cis), M_TEMP, M_ZERO | M_WAITOK);
  140         err = cardbus_parse_cis(parent, child, cb, sc->sc_cis);
  141         if (err) {
  142                 free(sc->sc_cis, M_TEMP);
  143                 sc->sc_cis = NULL;
  144                 return (err);
  145         }
  146         sc->sc_cis_open++;
  147         return (0);
  148 }
  149 
  150 static  int
  151 cardbus_close(struct cdev *dev, int fflags, int devtype, struct thread *td)
  152 {
  153         struct cardbus_softc *sc;
  154 
  155         sc = dev->si_drv1;
  156         free(sc->sc_cis, M_TEMP);
  157         sc->sc_cis = NULL;
  158         sc->sc_cis_open = 0;
  159         return (0);
  160 }
  161 
  162 static  int
  163 cardbus_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag,
  164     struct thread *td)
  165 {
  166         return (ENOTTY);
  167 }
  168 
  169 static  int
  170 cardbus_read(struct cdev *dev, struct uio *uio, int ioflag)
  171 {
  172         struct cardbus_softc *sc;
  173 
  174         sc = dev->si_drv1;
  175         /* EOF */
  176         if (sc->sc_cis == NULL || uio->uio_offset > sc->sc_cis->len)
  177                 return (0);
  178         return (uiomove(sc->sc_cis->buffer + uio->uio_offset,
  179           MIN(uio->uio_resid, sc->sc_cis->len - uio->uio_offset), uio));
  180 }

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FreeBSD/Linux Kernel Cross Reference sys/dev/cardbus/cardbus_device.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/cardbus/cardbus_device.c