1/*-
2 * Copyright (C) 2001 Eduardo Horvath.
3 * Copyright (c) 2007 Marius Strobl <marius@FreeBSD.org>
4 * All rights reserved.
5 *
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 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR  ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR  BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 *	from: NetBSD: if_gem_pci.c,v 1.7 2001/10/18 15:09:15 thorpej Exp
29 */
30
31#include <sys/cdefs.h>
32__FBSDID("$FreeBSD$");
33
34/*
35 * SBus bindings for Sun GEM Ethernet controllers
36 */
37
38#include <sys/param.h>
39#include <sys/systm.h>
40#include <sys/bus.h>
41#include <sys/kernel.h>
42#include <sys/lock.h>
43#include <sys/module.h>
44#include <sys/mutex.h>
45#include <sys/resource.h>
46#include <sys/rman.h>
47#include <sys/socket.h>
48
49#include <net/ethernet.h>
50#include <net/if.h>
51
52#include <dev/ofw/ofw_bus.h>
53
54#include <machine/bus.h>
55#include <machine/ofw_machdep.h>
56#include <machine/resource.h>
57
58#include <sparc64/sbus/sbusvar.h>
59
60#include <dev/gem/if_gemreg.h>
61#include <dev/gem/if_gemvar.h>
62
63#include "miibus_if.h"
64
65static device_probe_t gem_sbus_probe;
66static device_attach_t gem_sbus_attach;
67static device_detach_t gem_sbus_detach;
68static device_suspend_t gem_sbus_suspend;
69static device_resume_t gem_sbus_resume;
70
71static device_method_t gem_sbus_methods[] = {
72	/* Device interface */
73	DEVMETHOD(device_probe,		gem_sbus_probe),
74	DEVMETHOD(device_attach,	gem_sbus_attach),
75	DEVMETHOD(device_detach,	gem_sbus_detach),
76	DEVMETHOD(device_suspend,	gem_sbus_suspend),
77	DEVMETHOD(device_resume,	gem_sbus_resume),
78	/* Use the suspend handler here, it is all that is required. */
79	DEVMETHOD(device_shutdown,	gem_sbus_suspend),
80
81	/* MII interface */
82	DEVMETHOD(miibus_readreg,	gem_mii_readreg),
83	DEVMETHOD(miibus_writereg,	gem_mii_writereg),
84	DEVMETHOD(miibus_statchg,	gem_mii_statchg),
85
86	DEVMETHOD_END
87};
88
89static driver_t gem_sbus_driver = {
90	"gem",
91	gem_sbus_methods,
92	sizeof(struct gem_softc)
93};
94
95DRIVER_MODULE(gem, sbus, gem_sbus_driver, gem_devclass, 0, 0);
96MODULE_DEPEND(gem, sbus, 1, 1, 1);
97MODULE_DEPEND(gem, ether, 1, 1, 1);
98
99static int
100gem_sbus_probe(device_t dev)
101{
102
103	if (strcmp(ofw_bus_get_name(dev), "network") == 0 &&
104	    ofw_bus_get_compat(dev) != NULL &&
105	    strcmp(ofw_bus_get_compat(dev), "SUNW,sbus-gem") == 0) {
106		device_set_desc(dev, "Sun GEM Gigabit Ethernet");
107		return (0);
108	}
109
110	return (ENXIO);
111}
112
113static struct resource_spec gem_sbus_res_spec[] = {
114	{ SYS_RES_IRQ, 0, RF_SHAREABLE | RF_ACTIVE },	/* GEM_RES_INTR */
115	{ SYS_RES_MEMORY, 1, RF_ACTIVE },		/* GEM_RES_BANK1 */
116	{ SYS_RES_MEMORY, 0, RF_ACTIVE },		/* GEM_RES_BANK2 */
117	{ -1, 0 }
118};
119
120static int
121gem_sbus_attach(device_t dev)
122{
123	struct gem_softc *sc;
124	int burst;
125	uint32_t val;
126
127	sc = device_get_softc(dev);
128	sc->sc_variant = GEM_SUN_GEM;
129	sc->sc_dev = dev;
130	/* All known SBus models use a SERDES. */
131	sc->sc_flags = GEM_SERDES;
132
133	if (bus_alloc_resources(dev, gem_sbus_res_spec, sc->sc_res)) {
134		device_printf(dev, "failed to allocate resources\n");
135		bus_release_resources(dev, gem_sbus_res_spec, sc->sc_res);
136		return (ENXIO);
137	}
138
139	GEM_LOCK_INIT(sc, device_get_nameunit(dev));
140
141	OF_getetheraddr(dev, sc->sc_enaddr);
142
143	burst = sbus_get_burstsz(dev);
144	val = GEM_SBUS_CFG_PARITY;
145	if ((burst & SBUS_BURST64_MASK) != 0) {
146		val |= GEM_SBUS_CFG_64BIT;
147		burst >>= SBUS_BURST64_SHIFT;
148	}
149	if ((burst & SBUS_BURST_64) != 0)
150		val |= GEM_SBUS_CFG_BURST_64;
151	else if ((burst & SBUS_BURST_32) != 0)
152		val |= GEM_SBUS_CFG_BURST_32;
153	else {
154		device_printf(dev, "unsupported burst size\n");
155		goto fail;
156	}
157	/* Reset the SBus interface only. */
158	(void)GEM_BANK2_READ_4(sc, GEM_SBUS_BIF_RESET);
159	DELAY(100);
160	GEM_BANK2_WRITE_4(sc, GEM_SBUS_CONFIG, val);
161
162	if (gem_attach(sc) != 0) {
163		device_printf(dev, "could not be attached\n");
164		goto fail;
165	}
166
167	if (bus_setup_intr(dev, sc->sc_res[GEM_RES_INTR], INTR_TYPE_NET |
168	    INTR_MPSAFE, NULL, gem_intr, sc, &sc->sc_ih) != 0) {
169		device_printf(dev, "failed to set up interrupt\n");
170		gem_detach(sc);
171		goto fail;
172	}
173	return (0);
174
175 fail:
176	GEM_LOCK_DESTROY(sc);
177	bus_release_resources(dev, gem_sbus_res_spec, sc->sc_res);
178	return (ENXIO);
179}
180
181static int
182gem_sbus_detach(device_t dev)
183{
184	struct gem_softc *sc;
185
186	sc = device_get_softc(dev);
187	bus_teardown_intr(dev, sc->sc_res[GEM_RES_INTR], sc->sc_ih);
188	gem_detach(sc);
189	GEM_LOCK_DESTROY(sc);
190	bus_release_resources(dev, gem_sbus_res_spec, sc->sc_res);
191	return (0);
192}
193
194static int
195gem_sbus_suspend(device_t dev)
196{
197
198	gem_suspend(device_get_softc(dev));
199	return (0);
200}
201
202static int
203gem_sbus_resume(device_t dev)
204{
205
206	gem_resume(device_get_softc(dev));
207	return (0);
208}
209