FreeBSD/Linux Kernel Cross Reference
sys/sparc64/sparc64/eeprom_ebus.c

     /*
      * Copyright (c) 1992, 1993
      *      The Regents of the University of California.  All rights reserved.
      * Copyright (c) 1994 Gordon W. Ross
      * Copyright (c) 1993 Adam Glass
      * Copyright (c) 1996 Paul Kranenburg
      * Copyright (c) 1996
      *      The President and Fellows of Harvard College. All rights reserved.
      *
     * This software was developed by the Computer Systems Engineering group
     * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
     * contributed to Berkeley.
     *
     * All advertising materials mentioning features or use of this software
     * must display the following acknowledgement:
     *      This product includes software developed by Harvard University.
     *      This product includes software developed by the University of
     *      California, Lawrence Berkeley Laboratory.
     *
     * 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, 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.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by the University of
     *      California, Berkeley and its contributors.
     *      This product includes software developed by Paul Kranenburg.
     *      This product includes software developed by Harvard University.
     * 4. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
     *
     *      from: @(#)clock.c       8.1 (Berkeley) 6/11/93
     *      from: NetBSD: clock.c,v 1.41 2001/07/24 19:29:25 eeh Exp
     *
     * $FreeBSD: releng/5.2/sys/sparc64/sparc64/eeprom_ebus.c 119352 2003-08-23 05:56:58Z marcel $
     */
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/bus.h>
    #include <sys/kernel.h>
    #include <sys/malloc.h>
    #include <sys/resource.h>
    
    #include <machine/bus.h>
    #include <machine/idprom.h>
    #include <machine/resource.h>
    
    #include <sys/rman.h>
    
    #include <dev/ofw/openfirm.h>
    
    #include <machine/eeprom.h>
    
    #include <dev/mk48txx/mk48txxreg.h>
    
    #include <sparc64/ebus/ebusvar.h>
    
    #include "clock_if.h"
    
    /*
     * clock (eeprom) attaches at the sbus or the ebus
     */
    
    static int eeprom_ebus_probe(device_t);
    static int eeprom_ebus_attach(device_t);
    
    static device_method_t eeprom_ebus_methods[] = {
            /* Device interface */
            DEVMETHOD(device_probe,         eeprom_ebus_probe),
            DEVMETHOD(device_attach,        eeprom_ebus_attach),
    
            /* clock interface */
            DEVMETHOD(clock_gettime,        mk48txx_gettime),
            DEVMETHOD(clock_settime,        mk48txx_settime),
    
            { 0, 0 }
    };
    
    static driver_t eeprom_ebus_driver = {
           "eeprom",
           eeprom_ebus_methods,
           0,
   };
   
   DRIVER_MODULE(eeprom, ebus, eeprom_ebus_driver, eeprom_devclass, 0, 0);
   
   
   static int
   eeprom_ebus_probe(device_t dev)
   {
   
           if (strcmp("eeprom", ebus_get_name(dev)) == 0) {
                   device_set_desc(dev, "EBus EEPROM/clock");
                   return (0);
           }
           return (ENXIO);
   }
   
   /*
    * Attach a clock (really `eeprom') to the ebus.
    *
    * This is mapped read-only on NetBSD for safety, but this is not possible
    * with the current FreeBSD bus code.
    *
    * the MK48T02 is 2K.  the MK48T08 is 8K, and the MK48T59 is supposed to be
    * identical to it.
    */
   static int
   eeprom_ebus_attach(device_t dev)
   {
           struct resource *res;
           int rid, error;
   
           rid = 0;
           res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0UL, ~0UL, 1,
               RF_ACTIVE);
           if (res == NULL) {
                   device_printf(dev, "could not allocate resources\n");
                   return (ENXIO);
           }
           error = eeprom_attach(dev, ebus_get_node(dev), rman_get_bustag(res),
               rman_get_bushandle(res));
           return (error);
   }

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