FreeBSD/Linux Kernel Cross Reference
sys/sparc64/sparc64/eeprom.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.
     *
     * 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 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
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD: releng/6.0/sys/sparc64/sparc64/eeprom.c 146416 2005-05-19 21:16:50Z marius $");
    
    /*
     * clock (eeprom) attaches at EBus, FireHose or SBus
     */
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/bus.h>
    #include <sys/eventhandler.h>
    #include <sys/kernel.h>
    #include <sys/lock.h>
    #include <sys/module.h>
    #include <sys/mutex.h>
    #include <sys/resource.h>
    
    #include <dev/ofw/ofw_bus.h>
    
    #include <machine/bus.h>
    #include <machine/idprom.h>
    #include <machine/resource.h>
    
    #include <sys/rman.h>
    
    #include <dev/mk48txx/mk48txxvar.h>
    
    #include "clock_if.h"
    
    #define IDPROM_OFFSET   40
    
    static devclass_t eeprom_devclass;
    
    static device_probe_t eeprom_probe;
    static device_attach_t eeprom_attach;
    
    static device_method_t eeprom_methods[] = {
            /* Device interface */
            DEVMETHOD(device_probe,         eeprom_probe),
            DEVMETHOD(device_attach,        eeprom_attach),
    
            /* clock interface */
            DEVMETHOD(clock_gettime,        mk48txx_gettime),
            DEVMETHOD(clock_settime,        mk48txx_settime),
    
            { 0, 0 }
    };
    
    static driver_t eeprom_driver = {
           "eeprom",
           eeprom_methods,
           sizeof(struct mk48txx_softc),
   };
   
   DRIVER_MODULE(eeprom, ebus, eeprom_driver, eeprom_devclass, 0, 0);
   DRIVER_MODULE(eeprom, fhc, eeprom_driver, eeprom_devclass, 0, 0);
   DRIVER_MODULE(eeprom, sbus, eeprom_driver, eeprom_devclass, 0, 0);
   
   static int
   eeprom_probe(device_t dev)
   {
    
           if (strcmp("eeprom", ofw_bus_get_name(dev)) == 0) {
                   device_set_desc(dev, "EEPROM/clock");
                   return (0);
           }
           return (ENXIO);
   }
   
   static int
   eeprom_attach(device_t dev)
   {
           struct mk48txx_softc *sc;
           struct resource *res;
           struct timespec ts;
           uint32_t h;
           int error, i, rid;
   
           sc = device_get_softc(dev);
           bzero(sc, sizeof(struct mk48txx_softc));
   
           mtx_init(&sc->sc_mtx, "eeprom_mtx", NULL, MTX_DEF);
   
           rid = 0;
           res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
           if (res == NULL) {
                   device_printf(dev, "cannot allocate resources\n");
                   error = ENXIO;
                   goto fail_mtx;
           }
           sc->sc_bst = rman_get_bustag(res);
           sc->sc_bsh = rman_get_bushandle(res);
   
           if ((sc->sc_model = ofw_bus_get_model(dev)) == NULL) {
                   device_printf(dev, "cannot determine model\n");
                   error = ENXIO;
                   goto fail_res;
           }
   
           /* Our TOD clock year 0 is 1968 */
           sc->sc_year0 = 1968;
           /* Use default register read/write functions. */
           sc->sc_flag = 0;
           if ((error = mk48txx_attach(dev)) != 0) {
                   device_printf(dev, "cannot attach time of day clock\n");
                   goto fail_res;
           }
   
           /*
            * Get the hostid from the NVRAM. This serves no real purpose other
            * than being able to display it below as not all sparc64 models
            * have an `eeprom' device and even some that do store the hostid
            * elsewhere. The hostid in the NVRAM of the MK48Txx reads all zero
            * on the latter models. A generic way to retrieve the hostid is to
            * use the `idprom' node.
            */
           mtx_lock(&sc->sc_mtx);
           h = bus_space_read_1(sc->sc_bst, sc->sc_bsh, sc->sc_nvramsz -
               IDPROM_OFFSET + offsetof(struct idprom, id_machine)) << 24;
           for (i = 0; i < 3; i++) {
                   h |= bus_space_read_1(sc->sc_bst, sc->sc_bsh, sc->sc_nvramsz -
                       IDPROM_OFFSET + offsetof(struct idprom, id_hostid[i])) <<
                       ((2 - i) * 8);
           }
           mtx_unlock(&sc->sc_mtx);
           if (h != 0)
                   device_printf(dev, "hostid %x\n", (u_int)h);
   
           if (bootverbose) {
                   mk48txx_gettime(dev, &ts);
                   device_printf(dev, "current time: %ld.%09ld\n", (long)ts.tv_sec,
                       ts.tv_nsec);
           }
   
           return (0);
   
    fail_res:
           bus_release_resource(dev, SYS_RES_MEMORY, rid, res);
    fail_mtx:
           mtx_destroy(&sc->sc_mtx);
   
           return (error);
   }

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