Annotation of sys/dev/dec/if_le_dec.c, Revision 1.1.1.1
1.1 nbrk 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: */
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