FreeBSD/Linux Kernel Cross Reference
sys/dev/gem/if_gem_sbus.c

     /*-
      * Copyright (C) 2001 Eduardo Horvath.
      * Copyright (c) 2007 Marius Strobl <marius@FreeBSD.org>
      * 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, 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  ``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  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: NetBSD: if_gem_pci.c,v 1.7 2001/10/18 15:09:15 thorpej Exp
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD: releng/8.4/sys/dev/gem/if_gem_sbus.c 230714 2012-01-29 01:22:48Z marius $");
    
    /*
     * SBus bindings for Sun GEM Ethernet controllers
     */
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/bus.h>
    #include <sys/kernel.h>
    #include <sys/lock.h>
    #include <sys/module.h>
    #include <sys/mutex.h>
    #include <sys/resource.h>
    #include <sys/rman.h>
    #include <sys/socket.h>
    
    #include <net/ethernet.h>
    #include <net/if.h>
    
    #include <dev/ofw/ofw_bus.h>
    
    #include <machine/bus.h>
    #include <machine/ofw_machdep.h>
    #include <machine/resource.h>
    
    #include <sparc64/sbus/sbusvar.h>
    
    #include <dev/gem/if_gemreg.h>
    #include <dev/gem/if_gemvar.h>
    
    #include "miibus_if.h"
    
    static device_probe_t gem_sbus_probe;
    static device_attach_t gem_sbus_attach;
    static device_detach_t gem_sbus_detach;
    static device_suspend_t gem_sbus_suspend;
    static device_resume_t gem_sbus_resume;
    
    static device_method_t gem_sbus_methods[] = {
            /* Device interface */
            DEVMETHOD(device_probe,         gem_sbus_probe),
            DEVMETHOD(device_attach,        gem_sbus_attach),
            DEVMETHOD(device_detach,        gem_sbus_detach),
            DEVMETHOD(device_suspend,       gem_sbus_suspend),
            DEVMETHOD(device_resume,        gem_sbus_resume),
            /* Use the suspend handler here, it is all that is required. */
            DEVMETHOD(device_shutdown,      gem_sbus_suspend),
    
            /* MII interface */
            DEVMETHOD(miibus_readreg,       gem_mii_readreg),
            DEVMETHOD(miibus_writereg,      gem_mii_writereg),
            DEVMETHOD(miibus_statchg,       gem_mii_statchg),
    
            DEVMETHOD_END
    };
    
    static driver_t gem_sbus_driver = {
            "gem",
            gem_sbus_methods,
            sizeof(struct gem_softc)
    };
    
    DRIVER_MODULE(gem, sbus, gem_sbus_driver, gem_devclass, 0, 0);
    MODULE_DEPEND(gem, sbus, 1, 1, 1);
    MODULE_DEPEND(gem, ether, 1, 1, 1);
    
    static int
   gem_sbus_probe(device_t dev)
   {
   
           if (strcmp(ofw_bus_get_name(dev), "network") == 0 &&
               ofw_bus_get_compat(dev) != NULL &&
               strcmp(ofw_bus_get_compat(dev), "SUNW,sbus-gem") == 0) {
                   device_set_desc(dev, "Sun GEM Gigabit Ethernet");
                   return (0);
           }
   
           return (ENXIO);
   }
   
   static struct resource_spec gem_sbus_res_spec[] = {
           { SYS_RES_IRQ, 0, RF_SHAREABLE | RF_ACTIVE },   /* GEM_RES_INTR */
           { SYS_RES_MEMORY, 1, RF_ACTIVE },               /* GEM_RES_BANK1 */
           { SYS_RES_MEMORY, 0, RF_ACTIVE },               /* GEM_RES_BANK2 */
           { -1, 0 }
   };
   
   static int
   gem_sbus_attach(device_t dev)
   {
           struct gem_softc *sc;
           int burst;
           uint32_t val;
   
           sc = device_get_softc(dev);
           sc->sc_variant = GEM_SUN_GEM;
           sc->sc_dev = dev;
           /* All known SBus models use a SERDES. */
           sc->sc_flags = GEM_SERDES;
   
           if (bus_alloc_resources(dev, gem_sbus_res_spec, sc->sc_res)) {
                   device_printf(dev, "failed to allocate resources\n");
                   bus_release_resources(dev, gem_sbus_res_spec, sc->sc_res);
                   return (ENXIO);
           }
   
           GEM_LOCK_INIT(sc, device_get_nameunit(dev));
   
           OF_getetheraddr(dev, sc->sc_enaddr);
   
           burst = sbus_get_burstsz(dev);
           val = GEM_SBUS_CFG_PARITY;
           if ((burst & SBUS_BURST64_MASK) != 0) {
                   val |= GEM_SBUS_CFG_64BIT;
                   burst >>= SBUS_BURST64_SHIFT;
           }
           if ((burst & SBUS_BURST_64) != 0)
                   val |= GEM_SBUS_CFG_BURST_64;
           else if ((burst & SBUS_BURST_32) != 0)
                   val |= GEM_SBUS_CFG_BURST_32;
           else {
                   device_printf(dev, "unsupported burst size\n");
                   goto fail;
           }
           /* Reset the SBus interface only. */
           (void)GEM_BANK2_READ_4(sc, GEM_SBUS_BIF_RESET);
           DELAY(100);
           GEM_BANK2_WRITE_4(sc, GEM_SBUS_CONFIG, val);
   
           if (gem_attach(sc) != 0) {
                   device_printf(dev, "could not be attached\n");
                   goto fail;
           }
   
           if (bus_setup_intr(dev, sc->sc_res[GEM_RES_INTR], INTR_TYPE_NET |
               INTR_MPSAFE, NULL, gem_intr, sc, &sc->sc_ih) != 0) {
                   device_printf(dev, "failed to set up interrupt\n");
                   gem_detach(sc);
                   goto fail;
           }
           return (0);
   
    fail:
           GEM_LOCK_DESTROY(sc);
           bus_release_resources(dev, gem_sbus_res_spec, sc->sc_res);
           return (ENXIO);
   }
   
   static int
   gem_sbus_detach(device_t dev)
   {
           struct gem_softc *sc;
   
           sc = device_get_softc(dev);
           bus_teardown_intr(dev, sc->sc_res[GEM_RES_INTR], sc->sc_ih);
           gem_detach(sc);
           GEM_LOCK_DESTROY(sc);
           bus_release_resources(dev, gem_sbus_res_spec, sc->sc_res);
           return (0);
   }
   
   static int
   gem_sbus_suspend(device_t dev)
   {
   
           gem_suspend(device_get_softc(dev));
           return (0);
   }
   
   static int
   gem_sbus_resume(device_t dev)
   {
   
           gem_resume(device_get_softc(dev));
           return (0);
   }

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