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if_le_ibus.c revision 1.5 
      1 /*	$NetBSD: if_le_ibus.c,v 1.5 2002/09/26 20:36:51 thorpej Exp $	*/
      2 
      3 /*
      4  * Copyright 1996 The Board of Trustees of The Leland Stanford
      5  * Junior University. All Rights Reserved.
      6  *
      7  * Permission to use, copy, modify, and distribute this
      8  * software and its documentation for any purpose and without
      9  * fee is hereby granted, provided that the above copyright
     10  * notice appear in all copies.  Stanford University
     11  * makes no representations about the suitability of this
     12  * software for any purpose.  It is provided "as is" without
     13  * express or implied warranty.
     14  *
     15  * This driver was contributed by Jonathan Stone.
     16  */
     17 
     18 /*
     19  * LANCE on Decstation kn01/kn220(?) baseboard.
     20  */
     21 #include "opt_inet.h"
     22 
     23 #include <sys/param.h>
     24 #include <sys/socket.h>
     25 #include <sys/systm.h>
     26 
     27 #include <net/if.h>
     28 #include <net/if_ether.h>
     29 #include <net/if_media.h>
     30 
     31 #ifdef INET
     32 #include <netinet/in.h>
     33 #include <netinet/if_inarp.h>
     34 #endif
     35 
     36 #include <dev/ic/lancevar.h>
     37 #include <dev/ic/am7990var.h>
     38 
     39 #include <dev/tc/if_levar.h>
     40 #include <pmax/ibus/ibusvar.h>
     41 #include <pmax/pmax/kn01.h>
     42 
     43 static void le_dec_copyfrombuf_gap2(struct lance_softc *, void *, int, int);
     44 static void le_dec_copytobuf_gap2(struct lance_softc *, void *, int, int);
     45 static void le_dec_zerobuf_gap2(struct lance_softc *, int, int);
     46 
     47 
     48 static int le_pmax_match(struct device *, struct cfdata *, void *);
     49 static void le_pmax_attach(struct device *, struct device *, void *);
     50 
     51 struct cfattach le_pmax_ca = {
     52 	sizeof(struct le_softc), le_pmax_match, le_pmax_attach
     53 };
     54 
     55 int
     56 le_pmax_match(struct device *parent, struct cfdata *match, void *aux)
     57 {
     58 	struct ibus_attach_args *d = aux;
     59 
     60 	if (strcmp("lance", d->ia_name) != 0)
     61 		return (0);
     62 	return (1);
     63 }
     64 
     65 void
     66 le_pmax_attach(struct device *parent, struct device *self, void *aux)
     67 {
     68 	struct le_softc *lesc = (void *)self;
     69 	struct lance_softc *sc = &lesc->sc_am7990.lsc;
     70 	u_char *cp;
     71 	struct ibus_attach_args *ia = aux;
     72 
     73 	/*
     74 	 * It's on the baseboard, with a dedicated interrupt line.
     75 	 */
     76 	lesc->sc_r1 = (struct lereg1 *)(ia->ia_addr);
     77 	sc->sc_mem = (void *)MIPS_PHYS_TO_KSEG1(KN01_SYS_LANCE_B_START);
     78 	cp = (u_char *)(MIPS_PHYS_TO_KSEG1(KN01_SYS_CLOCK) + 1);
     79 
     80 	sc->sc_copytodesc = le_dec_copytobuf_gap2;
     81 	sc->sc_copyfromdesc = le_dec_copyfrombuf_gap2;
     82 	sc->sc_copytobuf = le_dec_copytobuf_gap2;
     83 	sc->sc_copyfrombuf = le_dec_copyfrombuf_gap2;
     84 	sc->sc_zerobuf = le_dec_zerobuf_gap2;
     85 
     86 	dec_le_common_attach(&lesc->sc_am7990, cp);
     87 
     88 	ibus_intr_establish(parent, (void*)ia->ia_cookie, IPL_NET,
     89 	    am7990_intr, sc);
     90 }
     91 
     92 /*
     93  * gap2: two bytes of data followed by two bytes of pad.
     94  *
     95  * Buffers must be 4-byte aligned.  The code doesn't worry about
     96  * doing an extra byte.
     97  */
     98 
     99 void
    100 le_dec_copytobuf_gap2(struct lance_softc *sc, void *fromv, int boff, int len)
    101 {
    102 	volatile caddr_t buf = sc->sc_mem;
    103 	caddr_t from = fromv;
    104 	volatile u_int16_t *bptr;
    105 
    106 	if (boff & 0x1) {
    107 		/* handle unaligned first byte */
    108 		bptr = ((volatile u_int16_t *)buf) + (boff - 1);
    109 		*bptr = (*from++ << 8) | (*bptr & 0xff);
    110 		bptr += 2;
    111 		len--;
    112 	} else
    113 		bptr = ((volatile u_int16_t *)buf) + boff;
    114 	while (len > 1) {
    115 		*bptr = (from[1] << 8) | (from[0] & 0xff);
    116 		bptr += 2;
    117 		from += 2;
    118 		len -= 2;
    119 	}
    120 	if (len == 1)
    121 		*bptr = (u_int16_t)*from;
    122 }
    123 
    124 void
    125 le_dec_copyfrombuf_gap2(struct lance_softc *sc, void *tov, int boff, int len)
    126 {
    127 	volatile caddr_t buf = sc->sc_mem;
    128 	caddr_t to = tov;
    129 	volatile u_int16_t *bptr;
    130 	u_int16_t tmp;
    131 
    132 	if (boff & 0x1) {
    133 		/* handle unaligned first byte */
    134 		bptr = ((volatile u_int16_t *)buf) + (boff - 1);
    135 		*to++ = (*bptr >> 8) & 0xff;
    136 		bptr += 2;
    137 		len--;
    138 	} else
    139 		bptr = ((volatile u_int16_t *)buf) + boff;
    140 	while (len > 1) {
    141 		tmp = *bptr;
    142 		*to++ = tmp & 0xff;
    143 		*to++ = (tmp >> 8) & 0xff;
    144 		bptr += 2;
    145 		len -= 2;
    146 	}
    147 	if (len == 1)
    148 		*to = *bptr & 0xff;
    149 }
    150 
    151 static void
    152 le_dec_zerobuf_gap2(struct lance_softc *sc, int boff, int len)
    153 {
    154 	volatile caddr_t buf = sc->sc_mem;
    155 	volatile u_int16_t *bptr;
    156 
    157 	if ((unsigned)boff & 0x1) {
    158 		bptr = ((volatile u_int16_t *)buf) + (boff - 1);
    159 		*bptr &= 0xff;
    160 		bptr += 2;
    161 		len--;
    162 	} else
    163 		bptr = ((volatile u_int16_t *)buf) + boff;
    164 	while (len > 0) {
    165 		*bptr = 0;
    166 		bptr += 2;
    167 		len -= 2;
    168 	}
    169 }
    170