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if_le_ibus.c revision 1.7 
      1 /*	$NetBSD: if_le_ibus.c,v 1.7 2002/10/02 04:15:09 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 CFATTACH_DECL(le_pmax, sizeof(struct le_softc),
     52     le_pmax_match, le_pmax_attach, NULL, NULL);
     53 
     54 int
     55 le_pmax_match(struct device *parent, struct cfdata *match, void *aux)
     56 {
     57 	struct ibus_attach_args *d = aux;
     58 
     59 	if (strcmp("lance", d->ia_name) != 0)
     60 		return (0);
     61 	return (1);
     62 }
     63 
     64 void
     65 le_pmax_attach(struct device *parent, struct device *self, void *aux)
     66 {
     67 	struct le_softc *lesc = (void *)self;
     68 	struct lance_softc *sc = &lesc->sc_am7990.lsc;
     69 	u_char *cp;
     70 	struct ibus_attach_args *ia = aux;
     71 
     72 	/*
     73 	 * It's on the baseboard, with a dedicated interrupt line.
     74 	 */
     75 	lesc->sc_r1 = (struct lereg1 *)(ia->ia_addr);
     76 	sc->sc_mem = (void *)MIPS_PHYS_TO_KSEG1(KN01_SYS_LANCE_B_START);
     77 	cp = (u_char *)(MIPS_PHYS_TO_KSEG1(KN01_SYS_CLOCK) + 1);
     78 
     79 	sc->sc_copytodesc = le_dec_copytobuf_gap2;
     80 	sc->sc_copyfromdesc = le_dec_copyfrombuf_gap2;
     81 	sc->sc_copytobuf = le_dec_copytobuf_gap2;
     82 	sc->sc_copyfrombuf = le_dec_copyfrombuf_gap2;
     83 	sc->sc_zerobuf = le_dec_zerobuf_gap2;
     84 
     85 	dec_le_common_attach(&lesc->sc_am7990, cp);
     86 
     87 	ibus_intr_establish(parent, (void*)ia->ia_cookie, IPL_NET,
     88 	    am7990_intr, sc);
     89 }
     90 
     91 /*
     92  * gap2: two bytes of data followed by two bytes of pad.
     93  *
     94  * Buffers must be 4-byte aligned.  The code doesn't worry about
     95  * doing an extra byte.
     96  */
     97 
     98 void
     99 le_dec_copytobuf_gap2(struct lance_softc *sc, void *fromv, int boff, int len)
    100 {
    101 	volatile caddr_t buf = sc->sc_mem;
    102 	caddr_t from = fromv;
    103 	volatile u_int16_t *bptr;
    104 
    105 	if (boff & 0x1) {
    106 		/* handle unaligned first byte */
    107 		bptr = ((volatile u_int16_t *)buf) + (boff - 1);
    108 		*bptr = (*from++ << 8) | (*bptr & 0xff);
    109 		bptr += 2;
    110 		len--;
    111 	} else
    112 		bptr = ((volatile u_int16_t *)buf) + boff;
    113 	while (len > 1) {
    114 		*bptr = (from[1] << 8) | (from[0] & 0xff);
    115 		bptr += 2;
    116 		from += 2;
    117 		len -= 2;
    118 	}
    119 	if (len == 1)
    120 		*bptr = (u_int16_t)*from;
    121 }
    122 
    123 void
    124 le_dec_copyfrombuf_gap2(struct lance_softc *sc, void *tov, int boff, int len)
    125 {
    126 	volatile caddr_t buf = sc->sc_mem;
    127 	caddr_t to = tov;
    128 	volatile u_int16_t *bptr;
    129 	u_int16_t tmp;
    130 
    131 	if (boff & 0x1) {
    132 		/* handle unaligned first byte */
    133 		bptr = ((volatile u_int16_t *)buf) + (boff - 1);
    134 		*to++ = (*bptr >> 8) & 0xff;
    135 		bptr += 2;
    136 		len--;
    137 	} else
    138 		bptr = ((volatile u_int16_t *)buf) + boff;
    139 	while (len > 1) {
    140 		tmp = *bptr;
    141 		*to++ = tmp & 0xff;
    142 		*to++ = (tmp >> 8) & 0xff;
    143 		bptr += 2;
    144 		len -= 2;
    145 	}
    146 	if (len == 1)
    147 		*to = *bptr & 0xff;
    148 }
    149 
    150 static void
    151 le_dec_zerobuf_gap2(struct lance_softc *sc, int boff, int len)
    152 {
    153 	volatile caddr_t buf = sc->sc_mem;
    154 	volatile u_int16_t *bptr;
    155 
    156 	if ((unsigned)boff & 0x1) {
    157 		bptr = ((volatile u_int16_t *)buf) + (boff - 1);
    158 		*bptr &= 0xff;
    159 		bptr += 2;
    160 		len--;
    161 	} else
    162 		bptr = ((volatile u_int16_t *)buf) + boff;
    163 	while (len > 0) {
    164 		*bptr = 0;
    165 		bptr += 2;
    166 		len -= 2;
    167 	}
    168 }
    169