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      1 /*	$NetBSD: if_le_ibus.c,v 1.13 2008/04/04 12:25:06 tsutsui 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 
     22 #include <sys/cdefs.h>
     23 __KERNEL_RCSID(0, "$NetBSD: if_le_ibus.c,v 1.13 2008/04/04 12:25:06 tsutsui Exp $");
     24 
     25 #include "opt_inet.h"
     26 
     27 #include <sys/param.h>
     28 #include <sys/socket.h>
     29 #include <sys/systm.h>
     30 #include <sys/device.h>
     31 
     32 #include <net/if.h>
     33 #include <net/if_ether.h>
     34 #include <net/if_media.h>
     35 
     36 #ifdef INET
     37 #include <netinet/in.h>
     38 #include <netinet/if_inarp.h>
     39 #endif
     40 
     41 #include <dev/ic/lancevar.h>
     42 #include <dev/ic/am7990var.h>
     43 
     44 #include <dev/tc/if_levar.h>
     45 #include <pmax/ibus/ibusvar.h>
     46 #include <pmax/pmax/kn01.h>
     47 
     48 static void le_dec_copyfrombuf_gap2(struct lance_softc *, void *, int, int);
     49 static void le_dec_copytobuf_gap2(struct lance_softc *, void *, int, int);
     50 static void le_dec_zerobuf_gap2(struct lance_softc *, int, int);
     51 
     52 
     53 static int le_pmax_match(device_t, cfdata_t, void *);
     54 static void le_pmax_attach(device_t, device_t, void *);
     55 
     56 CFATTACH_DECL_NEW(le_pmax, sizeof(struct le_softc),
     57     le_pmax_match, le_pmax_attach, NULL, NULL);
     58 
     59 int
     60 le_pmax_match(device_t parent, cfdata_t cf, void *aux)
     61 {
     62 	struct ibus_attach_args *d = aux;
     63 
     64 	if (strcmp("lance", d->ia_name) != 0)
     65 		return (0);
     66 	return (1);
     67 }
     68 
     69 void
     70 le_pmax_attach(device_t parent, device_t self, void *aux)
     71 {
     72 	struct le_softc *lesc = device_private(self);
     73 	struct lance_softc *sc = &lesc->sc_am7990.lsc;
     74 	uint8_t *cp;
     75 	struct ibus_attach_args *ia = aux;
     76 
     77 	/*
     78 	 * It's on the baseboard, with a dedicated interrupt line.
     79 	 */
     80 	sc->sc_dev = self;
     81 	lesc->sc_r1 = (struct lereg1 *)(ia->ia_addr);
     82 	sc->sc_mem = (void *)MIPS_PHYS_TO_KSEG1(KN01_SYS_LANCE_B_START);
     83 	cp = (uint8_t *)(MIPS_PHYS_TO_KSEG1(KN01_SYS_CLOCK) + 1);
     84 
     85 	sc->sc_copytodesc = le_dec_copytobuf_gap2;
     86 	sc->sc_copyfromdesc = le_dec_copyfrombuf_gap2;
     87 	sc->sc_copytobuf = le_dec_copytobuf_gap2;
     88 	sc->sc_copyfrombuf = le_dec_copyfrombuf_gap2;
     89 	sc->sc_zerobuf = le_dec_zerobuf_gap2;
     90 
     91 	dec_le_common_attach(&lesc->sc_am7990, cp);
     92 
     93 	ibus_intr_establish(parent, (void *)ia->ia_cookie, IPL_NET,
     94 	    am7990_intr, sc);
     95 }
     96 
     97 /*
     98  * gap2: two bytes of data followed by two bytes of pad.
     99  *
    100  * Buffers must be 4-byte aligned.  The code doesn't worry about
    101  * doing an extra byte.
    102  */
    103 
    104 void
    105 le_dec_copytobuf_gap2(struct lance_softc *sc, void *fromv, int boff, int len)
    106 {
    107 	volatile uint8_t *buf = sc->sc_mem;
    108 	uint8_t *from = fromv;
    109 	volatile uint16_t *bptr;
    110 
    111 	if (boff & 0x1) {
    112 		/* handle unaligned first byte */
    113 		bptr = ((volatile uint16_t *)buf) + (boff - 1);
    114 		*bptr = (*from++ << 8) | (*bptr & 0xff);
    115 		bptr += 2;
    116 		len--;
    117 	} else
    118 		bptr = ((volatile uint16_t *)buf) + boff;
    119 	while (len > 1) {
    120 		*bptr = (from[1] << 8) | (from[0] & 0xff);
    121 		bptr += 2;
    122 		from += 2;
    123 		len -= 2;
    124 	}
    125 	if (len == 1)
    126 		*bptr = (uint16_t)*from;
    127 }
    128 
    129 void
    130 le_dec_copyfrombuf_gap2(struct lance_softc *sc, void *tov, int boff, int len)
    131 {
    132 	volatile void *buf = sc->sc_mem;
    133 	uint8_t *to = tov;
    134 	volatile uint16_t *bptr;
    135 	uint16_t tmp;
    136 
    137 	if (boff & 0x1) {
    138 		/* handle unaligned first byte */
    139 		bptr = ((volatile uint16_t *)buf) + (boff - 1);
    140 		*to++ = (*bptr >> 8) & 0xff;
    141 		bptr += 2;
    142 		len--;
    143 	} else
    144 		bptr = ((volatile uint16_t *)buf) + boff;
    145 	while (len > 1) {
    146 		tmp = *bptr;
    147 		*to++ = tmp & 0xff;
    148 		*to++ = (tmp >> 8) & 0xff;
    149 		bptr += 2;
    150 		len -= 2;
    151 	}
    152 	if (len == 1)
    153 		*to = *bptr & 0xff;
    154 }
    155 
    156 static void
    157 le_dec_zerobuf_gap2(struct lance_softc *sc, int boff, int len)
    158 {
    159 	volatile void *buf = sc->sc_mem;
    160 	volatile uint16_t *bptr;
    161 
    162 	if ((unsigned int)boff & 0x1) {
    163 		bptr = ((volatile uint16_t *)buf) + (boff - 1);
    164 		*bptr &= 0xff;
    165 		bptr += 2;
    166 		len--;
    167 	} else
    168 		bptr = ((volatile uint16_t *)buf) + boff;
    169 	while (len > 0) {
    170 		*bptr = 0;
    171 		bptr += 2;
    172 		len -= 2;
    173 	}
    174 }
    175