1 /* $OpenBSD: if_le_dec.c,v 1.4 2007/06/18 21:24:43 jasper Exp $ */
2 /* $NetBSD: if_le_dec.c,v 1.12 2001/11/13 12:49:45 lukem Exp $ */
3
4 /*-
5 * Copyright (c) 1997 Jonathan Stone. All rights reserved.
6 * Copyright (c) 1995 Charles M. Hannum. All rights reserved.
7 * Copyright (c) 1992, 1993
8 * The Regents of the University of California. All rights reserved.
9 *
10 * This code is derived from software contributed to Berkeley by
11 * Ralph Campbell and Rick Macklem.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 * @(#)if_le.c 8.2 (Berkeley) 11/16/93
38 */
39
40 #include <sys/param.h>
41 #include <sys/systm.h>
42 #include <sys/mbuf.h>
43 #include <sys/syslog.h>
44 #include <sys/socket.h>
45 #include <sys/device.h>
46
47 #include <net/if.h>
48 #include <net/if_media.h>
49
50 #ifdef INET
51 #include <netinet/in.h>
52 #include <netinet/if_ether.h>
53 #endif
54
55 #include <dev/ic/am7990reg.h>
56 #include <dev/ic/am7990var.h>
57
58 #include <dev/tc/if_levar.h>
59 #include <dev/tc/tcvar.h>
60
61 #include <machine/bus.h>
62
63 /* access LANCE registers */
64 void le_dec_writereg(volatile u_short *regptr, u_short val);
65 #define LERDWR(cntl, src, dst) { (dst) = (src); tc_mb(); }
66 #define LEWREG(src, dst) le_dec_writereg(&(dst), (src))
67
68 void le_dec_wrcsr(struct am7990_softc *, u_int16_t, u_int16_t);
69 u_int16_t le_dec_rdcsr(struct am7990_softc *, u_int16_t);
70
71 void
72 dec_le_common_attach(struct am7990_softc *sc, u_char *eap)
73 {
74 int i;
75
76 sc->sc_rdcsr = le_dec_rdcsr;
77 sc->sc_wrcsr = le_dec_wrcsr;
78 sc->sc_hwinit = NULL;
79
80 sc->sc_conf3 = 0;
81 sc->sc_addr = 0;
82 sc->sc_memsize = 65536;
83
84 /*
85 * Get the ethernet address out of rom
86 */
87 for (i = 0; i < sizeof(sc->sc_arpcom.ac_enaddr); i++) {
88 sc->sc_arpcom.ac_enaddr[i] = *eap;
89 eap += 4;
90 }
91
92 am7990_config(sc);
93 }
94
95 void
96 le_dec_wrcsr(struct am7990_softc *sc, u_int16_t port, u_int16_t val)
97 {
98 struct lereg1 *ler1 = ((struct le_softc *)sc)->sc_r1;
99
100 LEWREG(port, ler1->ler1_rap);
101 LERDWR(port, val, ler1->ler1_rdp);
102 }
103
104 u_int16_t
105 le_dec_rdcsr(struct am7990_softc *sc, u_int16_t port)
106 {
107 struct lereg1 *ler1 = ((struct le_softc *)sc)->sc_r1;
108 u_int16_t val;
109
110 LEWREG(port, ler1->ler1_rap);
111 LERDWR(0, ler1->ler1_rdp, val);
112 return (val);
113 }
114
115 /*
116 * Write a lance register port, reading it back to ensure success. This seems
117 * to be necessary during initialization, since the chip appears to be a bit
118 * pokey sometimes.
119 */
120 void
121 le_dec_writereg(volatile u_short *regptr, u_short val)
122 {
123 int i = 0;
124
125 while (*regptr != val) {
126 *regptr = val;
127 tc_mb();
128 if (++i > 10000) {
129 printf("le: Reg did not settle (to x%x): x%x\n", val,
130 *regptr);
131 return;
132 }
133 DELAY(100);
134 }
135 }
136
137 /*
138 * Routines for accessing the transmit and receive buffers are provided
139 * by am7990.c, because of the LE_NEED_BUF_* macros defined above.
140 * Unfortunately, CPU addressing of these buffers is done in one of
141 * 3 ways:
142 * - contiguous (for the 3max and turbochannel option card)
143 * - gap2, which means shorts (2 bytes) interspersed with short (2 byte)
144 * spaces (for the pmax, vax 3400, and ioasic LANCE descriptors)
145 * - gap16, which means 16bytes interspersed with 16byte spaces
146 * for buffers which must begin on a 32byte boundary (for 3min, maxine,
147 * and alpha)
148 * The buffer offset is the logical byte offset, assuming contiguous storage.
149 */