FreeBSD/Linux Kernel Cross Reference
sys/dev/sbus/dma_sbus.c

     /*      $NetBSD: dma_sbus.c,v 1.21 2004/03/17 17:04:58 pk Exp $ */
     
     /*-
      * Copyright (c) 1998 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to The NetBSD Foundation
      * by Paul Kranenburg.
      *
     * 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 NetBSD
     *        Foundation, Inc. and its contributors.
     * 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
     */
    
    /*
     * Copyright (c) 1994 Peter Galbavy.  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.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by Peter Galbavy.
     * 4. The name of the author may not be used to endorse or promote products
     *    derived from this software without specific prior written permission.
     *
     * 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.
     */
    
    #include <sys/cdefs.h>
    __KERNEL_RCSID(0, "$NetBSD: dma_sbus.c,v 1.21 2004/03/17 17:04:58 pk Exp $");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/kernel.h>
    #include <sys/errno.h>
    #include <sys/device.h>
    #include <sys/malloc.h>
    
    #include <machine/bus.h>
    #include <machine/intr.h>
    #include <machine/autoconf.h>
    
    #include <dev/sbus/sbusvar.h>
    
    #include <dev/ic/lsi64854reg.h>
    #include <dev/ic/lsi64854var.h>
    
    struct dma_softc {
            struct lsi64854_softc   sc_lsi64854;    /* base device */
            struct sbusdev  sc_sd;                  /* sbus device */
    };
    
    int     dmamatch_sbus   __P((struct device *, struct cfdata *, void *));
    void    dmaattach_sbus  __P((struct device *, struct device *, void *));
    
    int     dmaprint_sbus   __P((void *, const char *));
    
    void    *dmabus_intr_establish __P((
                    bus_space_tag_t,
                    int,                    /*bus interrupt priority*/
                   int,                    /*`device class' level*/
                   int (*) __P((void *)),  /*handler*/
                   void *,                 /*handler arg*/
                   void (*) __P((void)))); /*optional fast trap handler*/
   
   static  bus_space_tag_t dma_alloc_bustag __P((struct dma_softc *sc));
   
   CFATTACH_DECL(dma_sbus, sizeof(struct dma_softc),
       dmamatch_sbus, dmaattach_sbus, NULL, NULL);
   
   CFATTACH_DECL(ledma, sizeof(struct dma_softc),
       dmamatch_sbus, dmaattach_sbus, NULL, NULL);
   
   int
   dmaprint_sbus(aux, busname)
           void *aux;
           const char *busname;
   {
           struct sbus_attach_args *sa = aux;
           bus_space_tag_t t = sa->sa_bustag;
           struct dma_softc *sc = t->cookie;
   
           sa->sa_bustag = sc->sc_lsi64854.sc_bustag;      /* XXX */
           sbus_print(aux, busname);       /* XXX */
           sa->sa_bustag = t;              /* XXX */
           return (UNCONF);
   }
   
   int
   dmamatch_sbus(parent, cf, aux)
           struct device *parent;
           struct cfdata *cf;
           void *aux;
   {
           struct sbus_attach_args *sa = aux;
   
           return (strcmp(cf->cf_name, sa->sa_name) == 0 ||
                   strcmp("espdma", sa->sa_name) == 0);
   }
   
   void
   dmaattach_sbus(parent, self, aux)
           struct device *parent, *self;
           void *aux;
   {
           struct sbus_attach_args *sa = aux;
           struct dma_softc *dsc = (void *)self;
           struct lsi64854_softc *sc = &dsc->sc_lsi64854;
           bus_space_tag_t sbt;
           int sbusburst, burst;
           int node;
   
           node = sa->sa_node;
   
           sc->sc_bustag = sa->sa_bustag;
           sc->sc_dmatag = sa->sa_dmatag;
   
           /* Map registers */
           if (sa->sa_npromvaddrs) {
                   sbus_promaddr_to_handle(sa->sa_bustag,
                           sa->sa_promvaddrs[0], &sc->sc_regs);
           } else {
                   if (sbus_bus_map(sa->sa_bustag,
                           sa->sa_slot, sa->sa_offset, sa->sa_size,
                           0, &sc->sc_regs) != 0) {
                           printf("%s: cannot map registers\n", self->dv_xname);
                           return;
                   }
           }
   
           /*
            * Get transfer burst size from PROM and plug it into the
            * controller registers. This is needed on the Sun4m; do
            * others need it too?
            */
           sbusburst = ((struct sbus_softc *)parent)->sc_burst;
           if (sbusburst == 0)
                   sbusburst = SBUS_BURST_32 - 1; /* 1->16 */
   
           burst = prom_getpropint(node,"burst-sizes", -1);
           if (burst == -1)
                   /* take SBus burst sizes */
                   burst = sbusburst;
   
           /* Clamp at parent's burst sizes */
           burst &= sbusburst;
           sc->sc_burst = (burst & SBUS_BURST_32) ? 32 :
                          (burst & SBUS_BURST_16) ? 16 : 0;
   
           if (strcmp(sc->sc_dev.dv_cfdata->cf_name, "ledma") == 0) {
                   char *cabletype;
                   u_int32_t csr;
                   /*
                    * Check to see which cable type is currently active and
                    * set the appropriate bit in the ledma csr so that it
                    * gets used. If we didn't netboot, the PROM won't have
                    * the "cable-selection" property; default to TP and then
                    * the user can change it via a "media" option to ifconfig.
                    */
                   cabletype = prom_getpropstring(node, "cable-selection");
                   csr = L64854_GCSR(sc);
                   if (strcmp(cabletype, "tpe") == 0) {
                           csr |= E_TP_AUI;
                   } else if (strcmp(cabletype, "aui") == 0) {
                           csr &= ~E_TP_AUI;
                   } else {
                           /* assume TP if nothing there */
                           csr |= E_TP_AUI;
                   }
                   L64854_SCSR(sc, csr);
                   delay(20000);   /* manual says we need a 20ms delay */
                   sc->sc_channel = L64854_CHANNEL_ENET;
           } else {
                   sc->sc_channel = L64854_CHANNEL_SCSI;
           }
   
           sbus_establish(&dsc->sc_sd, &sc->sc_dev);
           sbt = dma_alloc_bustag(dsc);
           lsi64854_attach(sc);
   
           /* Attach children */
           for (node = firstchild(sa->sa_node); node; node = nextsibling(node)) {
                   struct sbus_attach_args sa;
                   sbus_setup_attach_args((struct sbus_softc *)parent,
                                          sbt, sc->sc_dmatag, node, &sa);
                   (void) config_found(&sc->sc_dev, (void *)&sa, dmaprint_sbus);
                   sbus_destroy_attach_args(&sa);
           }
   }
   
   void *
   dmabus_intr_establish(t, pri, level, handler, arg, fastvec)
           bus_space_tag_t t;
           int pri;
           int level;
           int (*handler) __P((void *));
           void *arg;
           void (*fastvec) __P((void));    /* ignored */
   {
           struct lsi64854_softc *sc = t->cookie;
   
           /* XXX - for now only le; do esp later */
           if (sc->sc_channel == L64854_CHANNEL_ENET) {
                   sc->sc_intrchain = handler;
                   sc->sc_intrchainarg = arg;
                   handler = lsi64854_enet_intr;
                   arg = sc;
           }
           return (bus_intr_establish(sc->sc_bustag, pri, level,
                                      handler, arg));
   }
   
   bus_space_tag_t
   dma_alloc_bustag(sc)
           struct dma_softc *sc;
   {
           bus_space_tag_t sbt;
   
           sbt = (bus_space_tag_t) malloc(sizeof(struct sparc_bus_space_tag),
               M_DEVBUF, M_NOWAIT|M_ZERO);
           if (sbt == NULL)
                   return (NULL);
   
           sbt->cookie = sc;
           sbt->parent = sc->sc_lsi64854.sc_bustag;
           sbt->sparc_intr_establish = dmabus_intr_establish;
           return (sbt);
   }

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