if_le_dec.c revision 1.5 1 /* $NetBSD: if_le_dec.c,v 1.5 1997/03/17 03:19:11 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 1995 Charles M. Hannum. All rights reserved.
5 * Copyright (c) 1992, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * Ralph Campbell and Rick Macklem.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by the University of
22 * California, Berkeley and its contributors.
23 * 4. Neither the name of the University nor the names of its contributors
24 * may be used to endorse or promote products derived from this software
25 * without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * SUCH DAMAGE.
38 *
39 * @(#)if_le.c 8.2 (Berkeley) 11/16/93
40 */
41
42 #include "bpfilter.h"
43
44 #include <sys/param.h>
45 #include <sys/systm.h>
46 #include <sys/mbuf.h>
47 #include <sys/syslog.h>
48 #include <sys/socket.h>
49 #include <sys/device.h>
50
51 #include <net/if.h>
52 #include <net/if_ether.h>
53 #include <net/if_media.h>
54
55 #ifdef INET
56 #include <netinet/in.h>
57 #include <netinet/if_inarp.h>
58 #endif
59
60 #include <dev/ic/am7990reg.h>
61 #include <dev/ic/am7990var.h>
62
63 #include <dev/tc/if_levar.h>
64 #include <dev/tc/tcvar.h>
65
66 /* access LANCE registers */
67 void le_dec_writereg __P((volatile u_short *regptr, u_short val));
68 #define LERDWR(cntl, src, dst) { (dst) = (src); tc_mb(); }
69 #define LEWREG(src, dst) le_dec_writereg(&(dst), (src))
70
71 hide void le_dec_wrcsr __P((struct am7990_softc *, u_int16_t, u_int16_t));
72 hide u_int16_t le_dec_rdcsr __P((struct am7990_softc *, u_int16_t));
73
74 void
75 dec_le_common_attach(sc, eap)
76 struct am7990_softc *sc;
77 u_char *eap;
78 {
79 int i;
80
81 sc->sc_rdcsr = le_dec_rdcsr;
82 sc->sc_wrcsr = le_dec_wrcsr;
83 sc->sc_hwinit = NULL;
84
85 sc->sc_conf3 = 0;
86 sc->sc_addr = 0;
87 sc->sc_memsize = 65536;
88
89 /*
90 * Get the ethernet address out of rom
91 */
92 for (i = 0; i < sizeof(sc->sc_enaddr); i++) {
93 sc->sc_enaddr[i] = *eap;
94 eap += 4;
95 }
96
97 am7990_config(sc);
98 }
99
100 hide void
101 le_dec_wrcsr(sc, port, val)
102 struct am7990_softc *sc;
103 u_int16_t port, val;
104 {
105 struct lereg1 *ler1 = ((struct le_softc *)sc)->sc_r1;
106
107 LEWREG(port, ler1->ler1_rap);
108 LERDWR(port, val, ler1->ler1_rdp);
109 }
110
111 hide u_int16_t
112 le_dec_rdcsr(sc, port)
113 struct am7990_softc *sc;
114 u_int16_t port;
115 {
116 struct lereg1 *ler1 = ((struct le_softc *)sc)->sc_r1;
117 u_int16_t val;
118
119 LEWREG(port, ler1->ler1_rap);
120 LERDWR(0, ler1->ler1_rdp, val);
121 return (val);
122 }
123
124 /*
125 * Write a lance register port, reading it back to ensure success. This seems
126 * to be necessary during initialization, since the chip appears to be a bit
127 * pokey sometimes.
128 */
129 void
130 le_dec_writereg(regptr, val)
131 register volatile u_short *regptr;
132 register u_short val;
133 {
134 register int i = 0;
135
136 while (*regptr != val) {
137 *regptr = val;
138 tc_mb();
139 if (++i > 10000) {
140 printf("le: Reg did not settle (to x%x): x%x\n", val,
141 *regptr);
142 return;
143 }
144 DELAY(100);
145 }
146 }
147
148 /*
149 * Routines for accessing the transmit and receive buffers are provided
150 * by am7990.c, because of the LE_NEED_BUF_* macros defined above.
151 * Unfortunately, CPU addressing of these buffers is done in one of
152 * 3 ways:
153 * - contiguous (for the 3max and turbochannel option card)
154 * - gap2, which means shorts (2 bytes) interspersed with short (2 byte)
155 * spaces (for the pmax)
156 * - gap16, which means 16bytes interspersed with 16byte spaces
157 * for buffers which must begin on a 32byte boundary (for 3min, maxine,
158 * and alpha)
159 * The buffer offset is the logical byte offset, assuming contiguous storage.
160 */
161