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

     /*-
      * Copyright (c) 2005-2008, M. Warner Losh
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
      *    notice unmodified, this list of conditions, and the following
     *    disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     */
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    #include <sys/param.h>
    #include <sys/conf.h>
    #include <sys/malloc.h>
    #include <sys/systm.h>
    #include <sys/uio.h>
    
    #include <sys/bus.h>
    #include <machine/bus.h>
    #include <sys/rman.h>
    #include <machine/resource.h>
    
    #include <sys/pciio.h>
    #include <dev/pci/pcivar.h>
    #include <dev/pci/pcireg.h>
    #include <dev/pci/pci_private.h>
    
    #include <dev/cardbus/cardbusreg.h>
    #include <dev/cardbus/cardbusvar.h>
    #include <dev/cardbus/cardbus_cis.h>
    #include <dev/pccard/pccard_cis.h>
    
    static  d_open_t        cardbus_open;
    static  d_close_t       cardbus_close;
    static  d_read_t        cardbus_read;
    static  d_ioctl_t       cardbus_ioctl;
    
    static struct cdevsw cardbus_cdevsw = {
            .d_version =    D_VERSION,
            .d_open =       cardbus_open,
            .d_close =      cardbus_close,
            .d_read =       cardbus_read,
            .d_ioctl =      cardbus_ioctl,
            .d_name =       "cardbus"
    };
    
    static int
    cardbus_build_cis(device_t cbdev, device_t child, int id,
        int len, uint8_t *tupledata, uint32_t start, uint32_t *off,
        struct tuple_callbacks *info, void *argp)
    {
            struct cis_buffer *cis;
            int i;
    
            cis = (struct cis_buffer *)argp;
            /*
             * CISTPL_END is a special case, it has no length field.
             */
            if (id == CISTPL_END) {
                    if (cis->len + 1 > sizeof(cis->buffer)) {
                            cis->len = 0;
                            return (ENOSPC);
                    }
                    cis->buffer[cis->len++] = id;
                    return (0);
            }
            if (cis->len + 2 + len > sizeof(cis->buffer)) {
                    cis->len = 0;
                    return (ENOSPC);
            }
            cis->buffer[cis->len++] = id;
            cis->buffer[cis->len++] = len;
            for (i = 0; i < len; i++)
                    cis->buffer[cis->len++] = tupledata[i];
            return (0);
    }
    
    static int
    cardbus_device_buffer_cis(device_t parent, device_t child,
        struct cis_buffer *cbp)
   {
           struct tuple_callbacks cb[] = {
                   {CISTPL_GENERIC, "GENERIC", cardbus_build_cis}
           };
   
           return (cardbus_parse_cis(parent, child, cb, cbp));
   }
   
   int
   cardbus_device_create(struct cardbus_softc *sc, struct cardbus_devinfo *devi,
       device_t parent, device_t child)
   {
           uint32_t minor;
           int unit;
   
           cardbus_device_buffer_cis(parent, child, &devi->sc_cis);
           minor = (device_get_unit(sc->sc_dev) << 8) + devi->pci.cfg.func;
           unit = device_get_unit(sc->sc_dev);
           devi->sc_cisdev = make_dev(&cardbus_cdevsw, minor, 0, 0, 0666,
               "cardbus%d.%d.cis", unit, devi->pci.cfg.func);
           if (devi->pci.cfg.func == 0)
                   make_dev_alias(devi->sc_cisdev, "cardbus%d.cis", unit);
           devi->sc_cisdev->si_drv1 = devi;
           return (0);
   }
   
   int
   cardbus_device_destroy(struct cardbus_devinfo *devi)
   {
           if (devi->sc_cisdev)
                   destroy_dev(devi->sc_cisdev);
           return (0);
   }
   
   static  int
   cardbus_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
   {
   
           return (0);
   }
   
   static  int
   cardbus_close(struct cdev *dev, int fflags, int devtype, struct thread *td)
   {
   
           return (0);
   }
   
   static  int
   cardbus_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag,
       struct thread *td)
   {
           return (ENOTTY);
   }
   
   static  int
   cardbus_read(struct cdev *dev, struct uio *uio, int ioflag)
   {
           struct cardbus_devinfo *devi;
   
           devi = dev->si_drv1;
           /* EOF */
           if (uio->uio_offset >= devi->sc_cis.len)
                   return (0);
           return (uiomove(devi->sc_cis.buffer + uio->uio_offset,
             MIN(uio->uio_resid, devi->sc_cis.len - uio->uio_offset), uio));
   }

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