1 /* $NetBSD: if_gem_sbus.c,v 1.14 2022/09/25 18:03:04 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 2006 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Martin Husemann.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 /*
33 * SBus front-end for the GEM network driver
34 */
35
36 #include <sys/cdefs.h>
37 __KERNEL_RCSID(0, "$NetBSD: if_gem_sbus.c,v 1.14 2022/09/25 18:03:04 thorpej Exp $");
38
39 #include <sys/param.h>
40 #include <sys/systm.h>
41 #include <sys/syslog.h>
42 #include <sys/device.h>
43 #include <sys/socket.h>
44
45 #include <net/if.h>
46 #include <net/if_dl.h>
47 #include <net/if_ether.h>
48 #include <net/if_media.h>
49
50 #include <dev/mii/mii.h>
51 #include <dev/mii/miivar.h>
52
53 #include <sys/bus.h>
54 #include <sys/intr.h>
55 #include <machine/autoconf.h>
56
57 #include <dev/sbus/sbusvar.h>
58
59 #include <dev/ic/gemreg.h>
60 #include <dev/ic/gemvar.h>
61
62 struct gem_sbus_softc {
63 struct gem_softc gsc_gem; /* GEM device */
64 void *gsc_ih;
65 bus_space_handle_t gsc_sbus_regs_h;
66 };
67
68 int gemmatch_sbus(device_t, cfdata_t, void *);
69 void gemattach_sbus(device_t, device_t, void *);
70
71 CFATTACH_DECL3_NEW(gem_sbus, sizeof(struct gem_sbus_softc),
72 gemmatch_sbus, gemattach_sbus, NULL, NULL, NULL, NULL, 0);
73
74 int
gemmatch_sbus(device_t parent,cfdata_t cf,void * aux)75 gemmatch_sbus(device_t parent, cfdata_t cf, void *aux)
76 {
77 struct sbus_attach_args *sa = aux;
78
79 return (strcmp("network", sa->sa_name) == 0);
80 }
81
82 void
gemattach_sbus(device_t parent,device_t self,void * aux)83 gemattach_sbus(device_t parent, device_t self, void *aux)
84 {
85 struct sbus_attach_args *sa = aux;
86 struct gem_sbus_softc *gsc = device_private(self);
87 struct gem_softc *sc = &gsc->gsc_gem;
88 uint8_t enaddr[ETHER_ADDR_LEN];
89
90 sc->sc_dev = self;
91
92 /* Pass on the bus tags */
93 sc->sc_bustag = sa->sa_bustag;
94 sc->sc_dmatag = sa->sa_dmatag;
95
96 if (sa->sa_nreg < 2) {
97 printf("%s: only %d register sets\n",
98 device_xname(self), sa->sa_nreg);
99 return;
100 }
101
102 /*
103 * Map two register banks:
104 *
105 * bank 0: status, config, reset
106 * bank 1: various gem parts
107 *
108 */
109 if (sbus_bus_map(sa->sa_bustag,
110 sa->sa_reg[0].oa_space,
111 sa->sa_reg[0].oa_base,
112 (bus_size_t)sa->sa_reg[0].oa_size,
113 0, &sc->sc_h2) != 0) {
114 aprint_error_dev(self, "cannot map registers\n");
115 return;
116 }
117 if (sbus_bus_map(sa->sa_bustag,
118 sa->sa_reg[1].oa_space,
119 sa->sa_reg[1].oa_base,
120 (bus_size_t)sa->sa_reg[1].oa_size,
121 0, &sc->sc_h1) != 0) {
122 aprint_error_dev(self, "cannot map registers\n");
123 return;
124 }
125 prom_getether(sa->sa_node, enaddr);
126
127 if (!strcmp("serdes", prom_getpropstring(sa->sa_node, "shared-pins")))
128 sc->sc_flags |= GEM_SERDES;
129 sc->sc_variant = GEM_SUN_GEM;
130 sc->sc_flags &= ~GEM_PCI;
131
132 /*
133 * SBUS config
134 */
135 (void) bus_space_read_4(sa->sa_bustag, sc->sc_h2, GEM_SBUS_RESET);
136 delay(100);
137 bus_space_write_4(sa->sa_bustag, sc->sc_h2, GEM_SBUS_CONFIG,
138 GEM_SBUS_CFG_BSIZE128|GEM_SBUS_CFG_PARITY|GEM_SBUS_CFG_BMODE64);
139 sc->sc_chiprev = bus_space_read_4(sa->sa_bustag, sc->sc_h2,
140 GEM_SBUS_REVISION);
141
142 printf(": GEM Ethernet controller (%s), version %s (rev 0x%02x)\n",
143 sa->sa_name, prom_getpropstring(sa->sa_node, "version"),
144 sc->sc_chiprev);
145
146 gem_attach(sc, enaddr);
147
148 /* Establish interrupt handler */
149 if (sa->sa_nintr != 0)
150 gsc->gsc_ih = bus_intr_establish(sa->sa_bustag, sa->sa_pri, IPL_NET,
151 gem_intr, sc);
152 }
153