FreeBSD/Linux Kernel Cross Reference
sys/dev/mca/if_tr_mca.c

     /* $NetBSD: if_tr_mca.c,v 1.10 2002/10/02 16:34:12 thorpej Exp $ */
     
     /*_
      * Copyright (c) 2000 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to The NetBSD Foundation
      * by Gregory McGarry <g.mcgarry@ieee.org>.
      *
     * 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 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: if_tr_mca.c,v 1.10 2002/10/02 16:34:12 thorpej Exp $");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/socket.h>
    #include <sys/device.h>
    
    #include <dev/mca/mcareg.h>
    #include <dev/mca/mcavar.h>
    #include <dev/mca/mcadevs.h>
    
    #include <net/if.h>
    #include <net/if_media.h>
    #include <net/if_ether.h>
    
    #include <dev/ic/tropicreg.h>
    #include <dev/ic/tropicvar.h>
    
    #ifdef DEBUG
    #define DPRINTF(x) printf x
    #else
    #define DPRINTF(x)
    #endif
    
    #define TR_PRI_IOADDR 0x0a20
    #define TR_ALT_IOADDR 0x0a24
    #define TR_PIOSIZE 4
    #define TR_MMIOSIZE 8192
    #define TR_MBPS_4 0
    #define TR_MBPS_16 1
    
    int     tr_mca_probe __P((struct device *, struct cfdata *, void *));
    void    tr_mca_attach __P((struct device *, struct device *, void *));
    
    CFATTACH_DECL(tr_mca, sizeof(struct tr_softc),
        tr_mca_probe, tr_mca_attach, NULL, NULL);
    
    /* supported products */
    static const struct tr_mca_product {
            u_int32_t tr_id;
            const char *tr_name;
    } tr_mca_products[] = {
            { MCA_PRODUCT_ITR, "IBM Token Ring 16/4 Adapter/A" },
            { 0, NULL },
    };
    
    static const struct tr_mca_product *tr_mca_lookup __P((int));
    
    static const struct tr_mca_product *
    tr_mca_lookup(id)
            int id;
    {
            const struct tr_mca_product *trp;
    
            for(trp = tr_mca_products; trp->tr_name; trp++)
                    if (trp->tr_id == id)
                            return (trp);
    
            return (NULL);
    }
    
   int
   tr_mca_probe(parent, match, aux)
           struct device  *parent;
           struct cfdata  *match;
           void           *aux;
   {
           struct mca_attach_args *ma = aux;
   
           if (tr_mca_lookup(ma->ma_id) != NULL)
                   return (1);
   
           return (0);
   }
   
   
   void
   tr_mca_attach(parent, self, aux)
           struct device  *parent, *self;
           void           *aux;
   {
           struct tr_softc *sc = (void *) self;
           struct mca_attach_args *ma = aux;
           bus_space_handle_t pioh, mmioh, sramh;
           int iobase, irq, sram_size, sram_addr, rom_addr;
           int pos2, pos3, pos4, pos5;
           const struct tr_mca_product *tp;
   
           pos2 = mca_conf_read(ma->ma_mc, ma->ma_slot, 2);
           pos3 = mca_conf_read(ma->ma_mc, ma->ma_slot, 3);
           pos4 = mca_conf_read(ma->ma_mc, ma->ma_slot, 4);
           pos5 = mca_conf_read(ma->ma_mc, ma->ma_slot, 5);
   
           /*
            * POS register 2: (adf pos0)
            * 
            * 7 6 5 4 3 2 1 0
            * \___________/ \__ enable: 0=adapter disabled, 1=adapter enabled
            *       \__________ RAM addr: pos2&0xfe
            * 
            * POS register 3: (adf pos1)
            * 
            * 7 6 5 4 3 2 1 0
            * | \___/ | | | \__ port address: 1=0x0a24-0x0a27, 0=0x0a20-0x0a23
            * |   |   \ / \____ speed: 0=4Mbps, 1=16Mbps
            * |   |    \_______ RAM size: 00=8kb, 01=16kb, 10=32kb, 11=64kb
            * |   \____________ reserved: 010
            * \________________ irq component: 0=2, 1=3 (see also pos4)
            * 
            * POS register 4: (adf pos2)
            * 
            * 7 6 5 4 3 2 1 0
            * \___________/ \__ interrupt controller: 0=1st, 1=2nd
            *       \__________ ROM address: pos4&0xfe
            * 
            * POS register 5: (adf pos3)
            * 
            * 7 6 5 4 3 2 1 0
            * | | \_____/ 
            * | |    \_____ reserved: 0x0
            * | \__________ autosense: 0=off, 1=on
            * \____________ boot rom: 0=enabled, 1=disabled
            */
   
           if (pos3 & 0x01)
                   iobase = TR_ALT_IOADDR;
           else
                   iobase = TR_PRI_IOADDR;
   
           irq = 2 + (pos3 >> 7) + ((pos4 & 0x01) << 3);
           if (irq == 2)
                   irq = 9;
   
           tp = tr_mca_lookup(ma->ma_id);
   
           printf(" slot %d irq %d: %s\n", ma->ma_slot + 1, irq, tp->tr_name);
   
           sram_size = 8 << (((pos3 & 0x0c) >> 2) + 10);
           sram_addr = (pos2 & 0xfe) << 12;
   
           rom_addr = (pos4 & 0xfe) << 12;
   
           /* map the pio registers */
           if (bus_space_map(ma->ma_iot, iobase, TR_PIOSIZE, 0, &pioh)) {
                   printf("%s: unable to map PIO space\n", sc->sc_dev.dv_xname);
                   return;
           }
   
           /* map the mmio registers */
           if (bus_space_map(ma->ma_memt, rom_addr, TR_MMIOSIZE, 0, &mmioh)) {
                   printf("%s: unable to map MMIO space\n", sc->sc_dev.dv_xname);
                   return;
           }
   
           /* map the sram space */
           if (bus_space_map(ma->ma_memt, sram_addr, sram_size, 0, &sramh)) {
                   printf("%s: unable to map SRAM space\n", sc->sc_dev.dv_xname);
                   return;
           }
   
           sc->sc_piot = ma->ma_iot;
           sc->sc_pioh = pioh;
           sc->sc_memt = ma->ma_memt;
           sc->sc_mmioh = mmioh;
           sc->sc_sramh = sramh;
   
           /* set ACA offset */
           sc->sc_aca = TR_ACA_OFFSET;
           sc->sc_memwinsz = sram_size;
           sc->sc_maddr = sram_addr;
   
           /*
            * Determine total RAM on adapter and decide how much to use.
            * XXX Since we don't use RAM paging, use sc_memwinsz for now.
            */
           sc->sc_memsize = sc->sc_memwinsz;
           sc->sc_memreserved = 0;
   
           if (tr_reset(sc) != 0)
                   return;
   
           /* XXX not implemented (yet) */
           sc->sc_mediastatus = NULL;
           sc->sc_mediachange = NULL;
   
           /* do generic attach */
           if (tr_attach(sc) != 0)
                   return;
   
           /* establish interrupt handler */
           sc->sc_ih = mca_intr_establish(ma->ma_mc, irq, IPL_NET, tr_intr, sc);
           if (sc->sc_ih == NULL) {
                   printf("%s: couldn't establish interrupt handler\n",
                          sc->sc_dev.dv_xname);
                   return;
           }
   
   }

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