The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/i386/i386/geode.c

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    1 /*-
    2  * Copyright (c) 2003 Poul-Henning Kamp
    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, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. The names of the authors may not be used to endorse or promote
   14  *    products derived from this software without specific prior written
   15  *    permission.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  */
   29 
   30 #include <sys/cdefs.h>
   31 __FBSDID("$FreeBSD: releng/5.2/sys/i386/i386/geode.c 119608 2003-08-31 16:20:34Z phk $");
   32 
   33 #include <sys/param.h>
   34 #include <sys/systm.h>
   35 #include <sys/timetc.h>
   36 #include <sys/bus.h>
   37 #include <sys/kernel.h>
   38 #include <dev/pci/pcivar.h>
   39 
   40 static unsigned cba;
   41 static unsigned geode_counter;
   42 
   43 static unsigned
   44 geode_get_timecount(struct timecounter *tc)
   45 {
   46         return (inl(geode_counter));
   47 }
   48 
   49 static struct timecounter geode_timecounter = {
   50         geode_get_timecount,
   51         NULL,
   52         0xffffffff,
   53         27000000,
   54         "Geode",
   55         1000
   56 };
   57 
   58 
   59 static int
   60 geode_probe(device_t self)
   61 {
   62 
   63         if (pci_get_devid(self) != 0x0515100b)
   64                 return (ENXIO);
   65         if (geode_counter != 0)
   66                 return (ENXIO);
   67         cba = pci_read_config(self, 0x64, 4);
   68         printf("Geode CBA@ 0x%x\n", cba);
   69         geode_counter = cba + 0x08;
   70         outl(cba + 0x0d, 2);
   71         tc_init(&geode_timecounter);
   72         return (ENXIO);
   73 }
   74 
   75 static int
   76 geode_attach(device_t self)
   77 {
   78 
   79         return(ENODEV);
   80 }
   81 
   82 static device_method_t geode_methods[] = {
   83         /* Device interface */
   84         DEVMETHOD(device_probe,         geode_probe),
   85         DEVMETHOD(device_attach,        geode_attach),
   86         DEVMETHOD(device_suspend,       bus_generic_suspend),
   87         DEVMETHOD(device_resume,        bus_generic_resume),
   88         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   89         {0, 0}
   90 };
   91  
   92 static driver_t geode_driver = {
   93         "geode",
   94         geode_methods,
   95         0,
   96 };
   97 
   98 static devclass_t geode_devclass;
   99 
  100 DRIVER_MODULE(geode, pci, geode_driver, geode_devclass, 0, 0);

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