1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-NetBSD
3 *
4 * Copyright (C) 2001 Eduardo Horvath.
5 * Copyright (c) 2007 Marius Strobl <[email protected]>
6 * All rights reserved.
7 *
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, 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 * from: NetBSD: if_gem_pci.c,v 1.7 2001/10/18 15:09:15 thorpej Exp
31 */
32
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
35
36 /*
37 * SBus bindings for Sun GEM Ethernet controllers
38 */
39
40 #include <sys/param.h>
41 #include <sys/systm.h>
42 #include <sys/bus.h>
43 #include <sys/kernel.h>
44 #include <sys/lock.h>
45 #include <sys/module.h>
46 #include <sys/mutex.h>
47 #include <sys/resource.h>
48 #include <sys/rman.h>
49 #include <sys/socket.h>
50
51 #include <net/ethernet.h>
52 #include <net/if.h>
53
54 #include <dev/ofw/ofw_bus.h>
55
56 #include <machine/bus.h>
57 #include <machine/ofw_machdep.h>
58 #include <machine/resource.h>
59
60 #include <sparc64/sbus/sbusvar.h>
61
62 #include <dev/gem/if_gemreg.h>
63 #include <dev/gem/if_gemvar.h>
64
65 #include "miibus_if.h"
66
67 static device_probe_t gem_sbus_probe;
68 static device_attach_t gem_sbus_attach;
69 static device_detach_t gem_sbus_detach;
70 static device_suspend_t gem_sbus_suspend;
71 static device_resume_t gem_sbus_resume;
72
73 static device_method_t gem_sbus_methods[] = {
74 /* Device interface */
75 DEVMETHOD(device_probe, gem_sbus_probe),
76 DEVMETHOD(device_attach, gem_sbus_attach),
77 DEVMETHOD(device_detach, gem_sbus_detach),
78 DEVMETHOD(device_suspend, gem_sbus_suspend),
79 DEVMETHOD(device_resume, gem_sbus_resume),
80 /* Use the suspend handler here, it is all that is required. */
81 DEVMETHOD(device_shutdown, gem_sbus_suspend),
82
83 /* MII interface */
84 DEVMETHOD(miibus_readreg, gem_mii_readreg),
85 DEVMETHOD(miibus_writereg, gem_mii_writereg),
86 DEVMETHOD(miibus_statchg, gem_mii_statchg),
87
88 DEVMETHOD_END
89 };
90
91 static driver_t gem_sbus_driver = {
92 "gem",
93 gem_sbus_methods,
94 sizeof(struct gem_softc)
95 };
96
97 DRIVER_MODULE(gem, sbus, gem_sbus_driver, gem_devclass, 0, 0);
98 MODULE_DEPEND(gem, sbus, 1, 1, 1);
99 MODULE_DEPEND(gem, ether, 1, 1, 1);
100
101 static int
gem_sbus_probe(device_t dev)102 gem_sbus_probe(device_t dev)
103 {
104
105 if (strcmp(ofw_bus_get_name(dev), "network") == 0 &&
106 ofw_bus_get_compat(dev) != NULL &&
107 strcmp(ofw_bus_get_compat(dev), "SUNW,sbus-gem") == 0) {
108 device_set_desc(dev, "Sun GEM Gigabit Ethernet");
109 return (0);
110 }
111
112 return (ENXIO);
113 }
114
115 static struct resource_spec gem_sbus_res_spec[] = {
116 { SYS_RES_IRQ, 0, RF_SHAREABLE | RF_ACTIVE }, /* GEM_RES_INTR */
117 { SYS_RES_MEMORY, 1, RF_ACTIVE }, /* GEM_RES_BANK1 */
118 { SYS_RES_MEMORY, 0, RF_ACTIVE }, /* GEM_RES_BANK2 */
119 { -1, 0 }
120 };
121
122 static int
gem_sbus_attach(device_t dev)123 gem_sbus_attach(device_t dev)
124 {
125 struct gem_softc *sc;
126 int burst;
127 uint32_t val;
128
129 sc = device_get_softc(dev);
130 sc->sc_variant = GEM_SUN_GEM;
131 sc->sc_dev = dev;
132 /* All known SBus models use a SERDES. */
133 sc->sc_flags = GEM_SERDES;
134
135 if (bus_alloc_resources(dev, gem_sbus_res_spec, sc->sc_res)) {
136 device_printf(dev, "failed to allocate resources\n");
137 bus_release_resources(dev, gem_sbus_res_spec, sc->sc_res);
138 return (ENXIO);
139 }
140
141 GEM_LOCK_INIT(sc, device_get_nameunit(dev));
142
143 OF_getetheraddr(dev, sc->sc_enaddr);
144
145 burst = sbus_get_burstsz(dev);
146 val = GEM_SBUS_CFG_PARITY;
147 if ((burst & SBUS_BURST64_MASK) != 0) {
148 val |= GEM_SBUS_CFG_64BIT;
149 burst >>= SBUS_BURST64_SHIFT;
150 }
151 if ((burst & SBUS_BURST_64) != 0)
152 val |= GEM_SBUS_CFG_BURST_64;
153 else if ((burst & SBUS_BURST_32) != 0)
154 val |= GEM_SBUS_CFG_BURST_32;
155 else {
156 device_printf(dev, "unsupported burst size\n");
157 goto fail;
158 }
159 /* Reset the SBus interface only. */
160 (void)GEM_BANK2_READ_4(sc, GEM_SBUS_BIF_RESET);
161 DELAY(100);
162 GEM_BANK2_WRITE_4(sc, GEM_SBUS_CONFIG, val);
163
164 if (gem_attach(sc) != 0) {
165 device_printf(dev, "could not be attached\n");
166 goto fail;
167 }
168
169 if (bus_setup_intr(dev, sc->sc_res[GEM_RES_INTR], INTR_TYPE_NET |
170 INTR_MPSAFE, NULL, gem_intr, sc, &sc->sc_ih) != 0) {
171 device_printf(dev, "failed to set up interrupt\n");
172 gem_detach(sc);
173 goto fail;
174 }
175 return (0);
176
177 fail:
178 GEM_LOCK_DESTROY(sc);
179 bus_release_resources(dev, gem_sbus_res_spec, sc->sc_res);
180 return (ENXIO);
181 }
182
183 static int
gem_sbus_detach(device_t dev)184 gem_sbus_detach(device_t dev)
185 {
186 struct gem_softc *sc;
187
188 sc = device_get_softc(dev);
189 bus_teardown_intr(dev, sc->sc_res[GEM_RES_INTR], sc->sc_ih);
190 gem_detach(sc);
191 GEM_LOCK_DESTROY(sc);
192 bus_release_resources(dev, gem_sbus_res_spec, sc->sc_res);
193 return (0);
194 }
195
196 static int
gem_sbus_suspend(device_t dev)197 gem_sbus_suspend(device_t dev)
198 {
199
200 gem_suspend(device_get_softc(dev));
201 return (0);
202 }
203
204 static int
gem_sbus_resume(device_t dev)205 gem_sbus_resume(device_t dev)
206 {
207
208 gem_resume(device_get_softc(dev));
209 return (0);
210 }
211