1 /* $NetBSD: if_le_lebuffer.c,v 1.30 2022/09/25 18:03:04 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Charles M. Hannum; Jason R. Thorpe of the Numerical Aerospace
9 * Simulation Facility, NASA Ames Research Center; Paul Kranenburg.
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 *
20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 #include <sys/cdefs.h>
34 __KERNEL_RCSID(0, "$NetBSD: if_le_lebuffer.c,v 1.30 2022/09/25 18:03:04 thorpej Exp $");
35
36 #include "opt_inet.h"
37
38 #include <sys/param.h>
39 #include <sys/systm.h>
40 #include <sys/mbuf.h>
41 #include <sys/syslog.h>
42 #include <sys/socket.h>
43 #include <sys/device.h>
44
45 #include <net/if.h>
46 #include <net/if_ether.h>
47 #include <net/if_media.h>
48
49 #ifdef INET
50 #include <netinet/in.h>
51 #include <netinet/if_inarp.h>
52 #endif
53
54 #include <sys/bus.h>
55 #include <sys/intr.h>
56 #include <machine/autoconf.h>
57
58 #include <dev/sbus/sbusvar.h>
59 #include <dev/sbus/lebuffervar.h>
60
61 #include <dev/ic/lancereg.h>
62 #include <dev/ic/lancevar.h>
63 #include <dev/ic/am7990reg.h>
64 #include <dev/ic/am7990var.h>
65
66 #include "ioconf.h"
67
68 /*
69 * LANCE registers.
70 */
71 #define LEREG1_RDP 0 /* Register Data port */
72 #define LEREG1_RAP 2 /* Register Address port */
73
74 struct le_softc {
75 struct am7990_softc sc_am7990; /* glue to MI code */
76 bus_space_tag_t sc_bustag;
77 bus_dma_tag_t sc_dmatag;
78 bus_space_handle_t sc_reg; /* LANCE registers */
79 };
80
81
82 int lematch_lebuffer(device_t, cfdata_t, void *);
83 void leattach_lebuffer(device_t, device_t, void *);
84
85 /*
86 * Media types supported.
87 */
88 static int lemedia[] = {
89 IFM_ETHER | IFM_10_T,
90 };
91 #define NLEMEDIA __arraycount(lemedia)
92
93 CFATTACH_DECL_NEW(le_lebuffer, sizeof(struct le_softc),
94 lematch_lebuffer, leattach_lebuffer, NULL, NULL);
95
96 #if defined(_KERNEL_OPT)
97 #include "opt_ddb.h"
98 #endif
99
100 static void lewrcsr(struct lance_softc *, uint16_t, uint16_t);
101 static uint16_t lerdcsr(struct lance_softc *, uint16_t);
102
103 static void
lewrcsr(struct lance_softc * sc,uint16_t port,uint16_t val)104 lewrcsr(struct lance_softc *sc, uint16_t port, uint16_t val)
105 {
106 struct le_softc *lesc = (struct le_softc *)sc;
107 bus_space_tag_t t = lesc->sc_bustag;
108 bus_space_handle_t h = lesc->sc_reg;
109
110 bus_space_write_2(t, h, LEREG1_RAP, port);
111 bus_space_write_2(t, h, LEREG1_RDP, val);
112
113 #if defined(SUN4M)
114 /*
115 * We need to flush the Sbus->Mbus write buffers. This can most
116 * easily be accomplished by reading back the register that we
117 * just wrote (thanks to Chris Torek for this solution).
118 */
119 (void)bus_space_read_2(t, h, LEREG1_RDP);
120 #endif
121 }
122
123 static uint16_t
lerdcsr(struct lance_softc * sc,uint16_t port)124 lerdcsr(struct lance_softc *sc, uint16_t port)
125 {
126 struct le_softc *lesc = (struct le_softc *)sc;
127 bus_space_tag_t t = lesc->sc_bustag;
128 bus_space_handle_t h = lesc->sc_reg;
129
130 bus_space_write_2(t, h, LEREG1_RAP, port);
131 return (bus_space_read_2(t, h, LEREG1_RDP));
132 }
133
134 int
lematch_lebuffer(device_t parent,cfdata_t cf,void * aux)135 lematch_lebuffer(device_t parent, cfdata_t cf, void *aux)
136 {
137 struct sbus_attach_args *sa = aux;
138
139 return (strcmp(cf->cf_name, sa->sa_name) == 0);
140 }
141
142
143 void
leattach_lebuffer(device_t parent,device_t self,void * aux)144 leattach_lebuffer(device_t parent, device_t self, void *aux)
145 {
146 struct le_softc *lesc = device_private(self);
147 struct lance_softc *sc = &lesc->sc_am7990.lsc;
148 struct lebuf_softc *lebuf = device_private(parent);
149 struct sbus_attach_args *sa = aux;
150
151 sc->sc_dev = self;
152 lesc->sc_bustag = sa->sa_bustag;
153 lesc->sc_dmatag = sa->sa_dmatag;
154
155 if (sbus_bus_map(sa->sa_bustag,
156 sa->sa_slot,
157 sa->sa_offset,
158 sa->sa_size,
159 0, &lesc->sc_reg)) {
160 aprint_error(": cannot map registers\n");
161 return;
162 }
163
164 sc->sc_mem = lebuf->sc_buffer;
165 sc->sc_memsize = lebuf->sc_bufsiz;
166 sc->sc_addr = 0; /* Lance view is offset by buffer location */
167 lebuf->attached = 1;
168
169 /* That old black magic... */
170 sc->sc_conf3 = prom_getpropint(sa->sa_node, "busmaster-regval",
171 LE_C3_BSWP | LE_C3_ACON | LE_C3_BCON);
172
173 sc->sc_supmedia = lemedia;
174 sc->sc_nsupmedia = NLEMEDIA;
175 sc->sc_defaultmedia = lemedia[0];
176
177 prom_getether(sa->sa_node, sc->sc_enaddr);
178
179 sc->sc_copytodesc = lance_copytobuf_contig;
180 sc->sc_copyfromdesc = lance_copyfrombuf_contig;
181 sc->sc_copytobuf = lance_copytobuf_contig;
182 sc->sc_copyfrombuf = lance_copyfrombuf_contig;
183 sc->sc_zerobuf = lance_zerobuf_contig;
184
185 sc->sc_rdcsr = lerdcsr;
186 sc->sc_wrcsr = lewrcsr;
187
188 am7990_config(&lesc->sc_am7990);
189
190 /* Establish interrupt handler */
191 if (sa->sa_nintr != 0)
192 (void)bus_intr_establish(lesc->sc_bustag, sa->sa_pri,
193 IPL_NET, am7990_intr, sc);
194 }
195