1 /* $NetBSD: if_mbe_g2.c,v 1.9 2018/07/18 23:10:27 sevan Exp $ */
2
3 /*
4 * Copyright (c) 2002 Christian Groessler
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
23 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
25 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31 /*
32 * All Rights Reserved, Copyright (C) Fujitsu Limited 1995
33 *
34 * This software may be used, modified, copied, distributed, and sold, in
35 * both source and binary form provided that the above copyright, these
36 * terms and the following disclaimer are retained. The name of the author
37 * and/or the contributor may not be used to endorse or promote products
38 * derived from this software without specific prior written permission.
39 *
40 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND THE CONTRIBUTOR ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR THE CONTRIBUTOR BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION.
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50 * SUCH DAMAGE.
51 */
52
53 /*
54 * Portions copyright (C) 1993, David Greenman. This software may be used,
55 * modified, copied, distributed, and sold, in both source and binary form
56 * provided that the above copyright and these terms are retained. Under no
57 * circumstances is the author responsible for the proper functioning of this
58 * software, nor does the author assume any responsibility for damages
59 * incurred with its use.
60 */
61
62 /*
63 * Driver for Sega LAN Adapter (HIT-0300)
64 */
65
66 #include <sys/cdefs.h>
67 __KERNEL_RCSID(0, "$NetBSD: if_mbe_g2.c,v 1.9 2018/07/18 23:10:27 sevan Exp $");
68
69 #include <sys/param.h>
70 #include <sys/systm.h>
71 #include <sys/device.h>
72 #include <sys/bus.h>
73
74 #include <net/if.h>
75 #include <net/if_ether.h>
76 #include <net/if_media.h>
77
78 #include <machine/intr.h>
79 #include <machine/sysasicvar.h>
80 #include <machine/cpu.h>
81
82 #include <dev/ic/mb86960reg.h>
83 #include <dev/ic/mb86960var.h>
84
85 #include <dreamcast/dev/g2/g2busvar.h>
86
87
88 int mbe_g2_match(device_t, cfdata_t, void *);
89 void mbe_g2_attach(device_t, device_t, void *);
90 static int mbe_g2_detect(bus_space_tag_t, bus_space_handle_t, uint8_t *);
91
92 struct mbe_g2_softc {
93 struct mb86960_softc sc_mb86960; /* real "mb86960" softc */
94 };
95
96 CFATTACH_DECL_NEW(mbe_g2bus, sizeof(struct mbe_g2_softc),
97 mbe_g2_match, mbe_g2_attach, NULL, NULL);
98
99 #define LANA_NPORTS (0x20 * 4)
100
101 #ifdef LANA_DEBUG
102 #define DPRINTF printf
103 #else
104 #define DPRINTF while (/* CONSTCOND */0) printf
105 #endif
106
107 static struct dreamcast_bus_space mbe_g2_dbs;
108
109 /*
110 * Determine if the device is present.
111 */
112 int
mbe_g2_match(device_t parent,cfdata_t cf,void * aux)113 mbe_g2_match(device_t parent, cfdata_t cf, void *aux)
114 {
115 struct g2bus_attach_args *ga = aux;
116 bus_space_handle_t memh;
117 struct dreamcast_bus_space dbs;
118 bus_space_tag_t memt = &dbs;
119 static int lanafound;
120 int rv;
121 uint8_t myea[ETHER_ADDR_LEN];
122
123 if (lanafound)
124 return 0;
125
126 if (strcmp("mbe", cf->cf_name))
127 return 0;
128
129 memcpy(memt, ga->ga_memt, sizeof(struct dreamcast_bus_space));
130 g2bus_set_bus_mem_sparse(memt);
131
132 /* Map i/o ports. */
133 if (bus_space_map(memt, 0x00600400, LANA_NPORTS, 0, &memh)) {
134 DPRINTF("%s: couldn't map iospace 0x%x\n",
135 __func__, 0x00600400);
136 return 0;
137 }
138
139 rv = 0;
140 if (mbe_g2_detect(memt, memh, myea) == 0) {
141 DPRINTF("%s: LAN Adapter detection failed\n", __func__);
142 goto out;
143 }
144
145 rv = 1;
146 lanafound = 1;
147 out:
148 bus_space_unmap(memt, memh, LANA_NPORTS);
149 return rv;
150 }
151
152
153 /*
154 * Determine type and ethernet address.
155 */
156 static int
mbe_g2_detect(bus_space_tag_t iot,bus_space_handle_t ioh,uint8_t * enaddr)157 mbe_g2_detect(bus_space_tag_t iot, bus_space_handle_t ioh, uint8_t *enaddr)
158 {
159 uint8_t eeprom[FE_EEPROM_SIZE];
160
161 /* Read the chip type */
162 if ((bus_space_read_1(iot, ioh, FE_DLCR7) & FE_D7_IDENT) !=
163 FE_D7_IDENT_86967) {
164 DPRINTF("%s: unknown chip type\n", __func__);
165 return 0;
166 }
167
168 memset(eeprom, 0, FE_EEPROM_SIZE);
169
170 /* Get our station address from EEPROM. */
171 mb86965_read_eeprom(iot, ioh, eeprom);
172 memcpy(enaddr, eeprom, ETHER_ADDR_LEN);
173
174 DPRINTF("Ethernet address %s\n", ether_sprintf(enaddr));
175
176 /* Make sure we got a valid station address. */
177 if ((enaddr[0] & 0x03) != 0x00 ||
178 (enaddr[0] == 0x00 && enaddr[1] == 0x00 && enaddr[2] == 0x00)) {
179 DPRINTF("%s: invalid ethernet address\n", __func__);
180 return 0;
181 }
182
183 return 1;
184 }
185
186 void
mbe_g2_attach(device_t parent,device_t self,void * aux)187 mbe_g2_attach(device_t parent, device_t self, void *aux)
188 {
189 struct mbe_g2_softc *isc = device_private(self);
190 struct mb86960_softc *sc = &isc->sc_mb86960;
191 struct g2bus_attach_args *ga = aux;
192 bus_space_tag_t memt = &mbe_g2_dbs;
193 bus_space_handle_t memh;
194 uint8_t myea[ETHER_ADDR_LEN];
195
196 sc->sc_dev = self;
197
198 memcpy(memt, ga->ga_memt, sizeof(struct dreamcast_bus_space));
199 g2bus_set_bus_mem_sparse(memt);
200
201 /* Map i/o ports. */
202 if (bus_space_map(memt, 0x00600400, LANA_NPORTS, 0, &memh)) {
203 aprint_error(": can't map i/o space\n");
204 return;
205 }
206
207 sc->sc_bst = memt;
208 sc->sc_bsh = memh;
209
210 /* Determine the card type. */
211 if (mbe_g2_detect(memt, memh, myea) == 0) {
212 aprint_error(": where did the card go?!\n");
213 panic("unknown card");
214 }
215
216 aprint_normal(": Sega LAN-Adapter Ethernet\n");
217
218 /* This interface is always enabled. */
219 sc->sc_stat |= FE_STAT_ENABLED;
220
221 /* The LAN-Adapter uses 8 bit bus mode and slow SRAM. */
222 sc->sc_flags |= FE_FLAGS_SBW_BYTE | FE_FLAGS_SRAM_150ns;
223
224 /*
225 * Do generic MB86960 attach.
226 */
227 mb86960_attach(sc, myea);
228
229 mb86960_config(sc, NULL, 0, 0);
230
231 sysasic_intr_establish(SYSASIC_EVENT_8BIT, IPL_NET, SYSASIC_IRL11,
232 mb86960_intr, sc);
233 }
234