if_gem_sbus.c revision 330897 
1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-NetBSD
3 *
4 * Copyright (C) 2001 Eduardo Horvath.
5 * Copyright (c) 2007 Marius Strobl <marius@FreeBSD.org>
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: stable/11/sys/dev/gem/if_gem_sbus.c 330897 2018-03-14 03:19:51Z eadler $");
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
67static device_probe_t gem_sbus_probe;
68static device_attach_t gem_sbus_attach;
69static device_detach_t gem_sbus_detach;
70static device_suspend_t gem_sbus_suspend;
71static device_resume_t gem_sbus_resume;
72
73static 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
91static driver_t gem_sbus_driver = {
92	"gem",
93	gem_sbus_methods,
94	sizeof(struct gem_softc)
95};
96
97DRIVER_MODULE(gem, sbus, gem_sbus_driver, gem_devclass, 0, 0);
98MODULE_DEPEND(gem, sbus, 1, 1, 1);
99MODULE_DEPEND(gem, ether, 1, 1, 1);
100
101static int
102gem_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
115static 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
122static int
123gem_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
183static int
184gem_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
196static int
197gem_sbus_suspend(device_t dev)
198{
199
200	gem_suspend(device_get_softc(dev));
201	return (0);
202}
203
204static int
205gem_sbus_resume(device_t dev)
206{
207
208	gem_resume(device_get_softc(dev));
209	return (0);
210}
211