1 /* $OpenBSD: if_le_lebuffer.c,v 1.14 2022/03/13 13:34:54 mpi Exp $ */
2 /* $NetBSD: if_le_lebuffer.c,v 1.10 2002/03/11 16:00:56 pk Exp $ */
3
4 /*-
5 * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to The NetBSD Foundation
9 * by Charles M. Hannum; Jason R. Thorpe of the Numerical Aerospace
10 * Simulation Facility, NASA Ames Research Center; Paul Kranenburg.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
32 */
33
34 #include "bpfilter.h"
35
36 #include <sys/param.h>
37 #include <sys/systm.h>
38 #include <sys/mbuf.h>
39 #include <sys/syslog.h>
40 #include <sys/socket.h>
41 #include <sys/device.h>
42 #include <sys/malloc.h>
43
44 #include <net/if.h>
45 #include <net/if_media.h>
46
47 #include <netinet/in.h>
48 #include <netinet/if_ether.h>
49
50 #include <machine/bus.h>
51 #include <machine/intr.h>
52 #include <machine/autoconf.h>
53
54 #include <dev/sbus/sbusvar.h>
55 #include <dev/sbus/lebuffervar.h>
56
57 #include <dev/ic/lancereg.h>
58 #include <dev/ic/lancevar.h>
59 #include <dev/ic/am7990reg.h>
60 #include <dev/ic/am7990var.h>
61
62 /*
63 * LANCE registers.
64 */
65 #define LEREG1_RDP 0 /* Register Data port */
66 #define LEREG1_RAP 2 /* Register Address port */
67
68 struct le_softc {
69 struct am7990_softc sc_am7990; /* glue to MI code */
70 bus_space_tag_t sc_bustag;
71 bus_dma_tag_t sc_dmatag;
72 bus_space_handle_t sc_reg; /* LANCE registers */
73 };
74
75
76 int lematch_lebuffer(struct device *, void *, void *);
77 void leattach_lebuffer(struct device *, struct device *, void *);
78
79 /*
80 * Media types supported.
81 */
82 static uint64_t lemedia[] = {
83 IFM_ETHER | IFM_10_T
84 };
85
86 const struct cfattach le_lebuffer_ca = {
87 sizeof(struct le_softc), lematch_lebuffer, leattach_lebuffer
88 };
89
90 extern struct cfdriver le_cd;
91
92 struct cfdriver lebuffer_cd = {
93 NULL, "lebuffer", DV_DULL
94 };
95
96 void le_lebuffer_wrcsr(struct lance_softc *, uint16_t, uint16_t);
97 uint16_t le_lebuffer_rdcsr(struct lance_softc *, uint16_t);
98
99 void
le_lebuffer_wrcsr(struct lance_softc * sc,uint16_t port,uint16_t val)100 le_lebuffer_wrcsr(struct lance_softc *sc, uint16_t port, uint16_t val)
101 {
102 struct le_softc *lesc = (struct le_softc *)sc;
103
104 bus_space_write_2(lesc->sc_bustag, lesc->sc_reg, LEREG1_RAP, port);
105 bus_space_barrier(lesc->sc_bustag, lesc->sc_reg, LEREG1_RAP, 2,
106 BUS_SPACE_BARRIER_WRITE);
107 bus_space_write_2(lesc->sc_bustag, lesc->sc_reg, LEREG1_RDP, val);
108 bus_space_barrier(lesc->sc_bustag, lesc->sc_reg, LEREG1_RDP, 2,
109 BUS_SPACE_BARRIER_WRITE);
110
111 #if defined(SUN4M)
112 /*
113 * We need to flush the SBus->MBus write buffers. This can most
114 * easily be accomplished by reading back the register that we
115 * just wrote (thanks to Chris Torek for this solution).
116 */
117 if (CPU_ISSUN4M) {
118 volatile uint16_t discard;
119 discard = bus_space_read_2(lesc->sc_bustag, lesc->sc_reg,
120 LEREG1_RDP);
121 }
122 #endif
123 }
124
125 uint16_t
le_lebuffer_rdcsr(struct lance_softc * sc,uint16_t port)126 le_lebuffer_rdcsr(struct lance_softc *sc, uint16_t port)
127 {
128 struct le_softc *lesc = (struct le_softc *)sc;
129
130 bus_space_write_2(lesc->sc_bustag, lesc->sc_reg, LEREG1_RAP, port);
131 bus_space_barrier(lesc->sc_bustag, lesc->sc_reg, LEREG1_RAP, 2,
132 BUS_SPACE_BARRIER_WRITE);
133 return (bus_space_read_2(lesc->sc_bustag, lesc->sc_reg, LEREG1_RDP));
134 }
135
136 int
lematch_lebuffer(struct device * parent,void * vcf,void * aux)137 lematch_lebuffer(struct device *parent, void *vcf, void *aux)
138 {
139 struct sbus_attach_args *sa = aux;
140 struct cfdata *cf = vcf;
141
142 return (strcmp(cf->cf_driver->cd_name, sa->sa_name) == 0);
143 }
144
145
146 void
leattach_lebuffer(struct device * parent,struct device * self,void * aux)147 leattach_lebuffer(struct device *parent, struct device *self, void *aux)
148 {
149 struct sbus_attach_args *sa = aux;
150 struct le_softc *lesc = (struct le_softc *)self;
151 struct lance_softc *sc = &lesc->sc_am7990.lsc;
152 struct lebuf_softc *lebuf = (struct lebuf_softc *)parent;
153 /* XXX the following declarations should be elsewhere */
154 extern void myetheraddr(u_char *);
155
156 lesc->sc_bustag = sa->sa_bustag;
157 lesc->sc_dmatag = sa->sa_dmatag;
158
159 if (sbus_bus_map(sa->sa_bustag,
160 sa->sa_slot, sa->sa_offset, sa->sa_size,
161 0, 0, &lesc->sc_reg)) {
162 printf(": cannot map registers\n");
163 return;
164 }
165
166 sc->sc_mem = lebuf->sc_buffer;
167 sc->sc_memsize = lebuf->sc_bufsiz;
168 sc->sc_addr = 0; /* Lance view is offset by buffer location */
169 lebuf->attached = 1;
170
171 /* That old black magic... */
172 sc->sc_conf3 = getpropint(sa->sa_node, "busmaster-regval",
173 LE_C3_BSWP | LE_C3_ACON | LE_C3_BCON);
174
175 myetheraddr(sc->sc_arpcom.ac_enaddr);
176
177 sc->sc_supmedia = lemedia;
178 sc->sc_nsupmedia = nitems(lemedia);
179 sc->sc_defaultmedia = sc->sc_supmedia[sc->sc_nsupmedia - 1];
180
181 sc->sc_copytodesc = lance_copytobuf_contig;
182 sc->sc_copyfromdesc = lance_copyfrombuf_contig;
183 sc->sc_copytobuf = lance_copytobuf_contig;
184 sc->sc_copyfrombuf = lance_copyfrombuf_contig;
185 sc->sc_zerobuf = lance_zerobuf_contig;
186
187 sc->sc_rdcsr = le_lebuffer_rdcsr;
188 sc->sc_wrcsr = le_lebuffer_wrcsr;
189
190 am7990_config(&lesc->sc_am7990);
191
192 /* Establish interrupt handler */
193 if (sa->sa_nintr != 0)
194 (void)bus_intr_establish(lesc->sc_bustag, sa->sa_pri,
195 IPL_NET, 0, am7990_intr, sc, self->dv_xname);
196 }
197