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if_sn_obio.c revision 1.2 
      1 /*	$NetBSD: if_sn_obio.c,v 1.2 1997/03/16 13:41:16 is Exp $	*/
      2 
      3 /*
      4  * Copyright (C) 1997 Allen Briggs
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *      This product includes software developed by Allen Briggs
     18  * 4. The name of the author may not be used to endorse or promote products
     19  *    derived from this software without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 
     33 #include <sys/param.h>
     34 #include <sys/device.h>
     35 #include <sys/errno.h>
     36 #include <sys/ioctl.h>
     37 #include <sys/socket.h>
     38 #include <sys/syslog.h>
     39 #include <sys/systm.h>
     40 
     41 #include <net/if.h>
     42 #include <net/if_ether.h>
     43 
     44 #if 0 /* XXX this shouldn't be necessary... else reinsert */
     45 #ifdef INET
     46 #include <netinet/in.h>
     47 #include <netinet/if_ether.h>
     48 #endif
     49 #endif
     50 
     51 #include <machine/bus.h>
     52 #include <machine/cpu.h>
     53 #include <machine/viareg.h>
     54 
     55 #include "obiovar.h"
     56 #include "if_snreg.h"
     57 #include "if_snvar.h"
     58 
     59 #define SONIC_REG_BASE	0x50F0A000
     60 #define SONIC_PROM_BASE	0x50F08000
     61 
     62 static int	sn_obio_match __P((struct device *, struct cfdata *, void *));
     63 static void	sn_obio_attach __P((struct device *, struct device *, void *));
     64 static void	sn_obio_getaddr __P((struct sn_softc *));
     65 
     66 struct cfattach sn_obio_ca = {
     67 	sizeof(struct sn_softc), sn_obio_match, sn_obio_attach
     68 };
     69 
     70 static int
     71 sn_obio_match(parent, cf, aux)
     72 	struct device *parent;
     73 	struct cfdata *cf;
     74 	void *aux;
     75 {
     76 	if (mac68k_machine.sonic)
     77 		return 1;
     78 
     79 	return 0;
     80 }
     81 
     82 /*
     83  * Install interface into kernel networking data structures
     84  */
     85 static void
     86 sn_obio_attach(parent, self, aux)
     87 	struct device *parent, *self;
     88 	void   *aux;
     89 {
     90 	struct obio_attach_args *oa = (struct obio_attach_args *) aux;
     91         struct sn_softc *sc = (void *)self;
     92 	u_int8_t myaddr[ETHER_ADDR_LEN];
     93 
     94         sc->s_dcr = DCR_LBR | DCR_SYNC | DCR_WAIT0 |
     95                     DCR_DMABLOCK | DCR_RFT16 | DCR_TFT16;
     96 
     97         switch (current_mac_model->class) {
     98         case MACH_CLASSQ:
     99         case MACH_CLASSQ2:
    100                 sc->s_dcr |= DCR_DW32;
    101 		sc->bitmode = 1;
    102                 break;
    103 
    104         case MACH_CLASSPB:
    105                 sc->s_dcr |= DCR_DW16;
    106 		sc->bitmode = 0;
    107                 return;
    108 
    109 	default:
    110 		printf("unsupported machine type\n");
    111 		return;
    112         }
    113 
    114 	sc->sc_regt = oa->oa_tag;
    115 	if (bus_space_map(sc->sc_regt, SONIC_REG_BASE, SN_REGSIZE,
    116 				0, &sc->sc_regh)) {
    117 		panic("failed to map space for SONIC regs.\n");
    118 	}
    119 
    120 	sc->slotno = 9;
    121 
    122 	sn_obio_getaddr(sc, myaddr);
    123 
    124 	snsetup(sc, myaddr);
    125 }
    126 
    127 static u_char bbr4[] = {0,8,4,12,2,10,6,14,1,9,5,13,3,11,7,15};
    128 #define bbr(v)	((bbr4[(v)&0xf] << 4) | bbr4[((v)>>4) & 0xf])
    129 
    130 static void
    131 sn_obio_getaddr(sc, lladdr)
    132 	struct sn_softc	*sc;
    133 	u_int8_t *lladdr;
    134 {
    135 	bus_space_handle_t	bsh;
    136 	int			i, do_bbr;
    137 	u_char			b;
    138 
    139 	if (bus_space_map(sc->sc_regt, SONIC_PROM_BASE, NBPG, 0, &bsh)) {
    140 		panic("failed to map space to read SONIC address.\n");
    141 	}
    142 
    143 	/*
    144 	 * Apparently Apple goofed here.  The ethernet MAC address is
    145 	 * stored in bit-byte-reversed format.  It is rumored that this
    146 	 * is only true for some systems.
    147 	 */
    148 	do_bbr = 0;
    149 	b = bus_space_read_1(sc->sc_regt, bsh, 0);
    150 	if (b == 0x10)
    151 		do_bbr = 1;
    152 	lladdr[0] = (do_bbr) ? bbr(b) : b;
    153 
    154 	for (i = 1 ; i < ETHER_ADDR_LEN ; i++) {
    155 		b = bus_space_read_1(sc->sc_regt, bsh, i);
    156 		lladdr[i] = (do_bbr) ? bbr(b) : b;
    157 	}
    158 
    159 	bus_space_unmap(sc->sc_regt, bsh, NBPG);
    160 }
    161