if_le_lebuffer.c revision 1.24 
1/*	$NetBSD: if_le_lebuffer.c,v 1.24 2008/04/28 20:23:57 martin Exp $	*/
2
3/*-
4 * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Charles M. Hannum; Jason R. Thorpe of the Numerical Aerospace
9 * Simulation Facility, NASA Ames Research Center; Paul Kranenburg.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33#include <sys/cdefs.h>
34__KERNEL_RCSID(0, "$NetBSD: if_le_lebuffer.c,v 1.24 2008/04/28 20:23:57 martin Exp $");
35
36#include "opt_inet.h"
37#include "bpfilter.h"
38
39#include <sys/param.h>
40#include <sys/systm.h>
41#include <sys/mbuf.h>
42#include <sys/syslog.h>
43#include <sys/socket.h>
44#include <sys/device.h>
45#include <sys/malloc.h>
46
47#include <net/if.h>
48#include <net/if_ether.h>
49#include <net/if_media.h>
50
51#ifdef INET
52#include <netinet/in.h>
53#include <netinet/if_inarp.h>
54#endif
55
56#include <sys/bus.h>
57#include <sys/intr.h>
58#include <machine/autoconf.h>
59
60#include <dev/sbus/sbusvar.h>
61#include <dev/sbus/lebuffervar.h>
62
63#include <dev/ic/lancereg.h>
64#include <dev/ic/lancevar.h>
65#include <dev/ic/am7990reg.h>
66#include <dev/ic/am7990var.h>
67
68#include "ioconf.h"
69
70/*
71 * LANCE registers.
72 */
73#define LEREG1_RDP	0	/* Register Data port */
74#define LEREG1_RAP	2	/* Register Address port */
75
76struct	le_softc {
77	struct	am7990_softc	sc_am7990;	/* glue to MI code */
78	struct	sbusdev		sc_sd;		/* sbus device */
79	bus_space_tag_t		sc_bustag;
80	bus_dma_tag_t		sc_dmatag;
81	bus_space_handle_t	sc_reg;		/* LANCE registers */
82};
83
84
85int	lematch_lebuffer(device_t, cfdata_t, void *);
86void	leattach_lebuffer(device_t, device_t, void *);
87
88/*
89 * Media types supported.
90 */
91static int lemedia[] = {
92	IFM_ETHER|IFM_10_T,
93};
94#define NLEMEDIA	__arraycount(lemedia)
95
96CFATTACH_DECL_NEW(le_lebuffer, sizeof(struct le_softc),
97    lematch_lebuffer, leattach_lebuffer, NULL, NULL);
98
99#if defined(_KERNEL_OPT)
100#include "opt_ddb.h"
101#endif
102
103static void lewrcsr(struct lance_softc *, uint16_t, uint16_t);
104static uint16_t lerdcsr(struct lance_softc *, uint16_t);
105
106static void
107lewrcsr(struct lance_softc *sc, uint16_t port, uint16_t val)
108{
109	struct le_softc *lesc = (struct le_softc *)sc;
110	bus_space_tag_t t = lesc->sc_bustag;
111	bus_space_handle_t h = lesc->sc_reg;
112
113	bus_space_write_2(t, h, LEREG1_RAP, port);
114	bus_space_write_2(t, h, LEREG1_RDP, val);
115
116#if defined(SUN4M)
117	/*
118	 * We need to flush the Sbus->Mbus write buffers. This can most
119	 * easily be accomplished by reading back the register that we
120	 * just wrote (thanks to Chris Torek for this solution).
121	 */
122	(void)bus_space_read_2(t, h, LEREG1_RDP);
123#endif
124}
125
126static uint16_t
127lerdcsr(struct lance_softc *sc, uint16_t port)
128{
129	struct le_softc *lesc = (struct le_softc *)sc;
130	bus_space_tag_t t = lesc->sc_bustag;
131	bus_space_handle_t h = lesc->sc_reg;
132
133	bus_space_write_2(t, h, LEREG1_RAP, port);
134	return (bus_space_read_2(t, h, LEREG1_RDP));
135}
136
137int
138lematch_lebuffer(device_t parent, cfdata_t cf, void *aux)
139{
140	struct sbus_attach_args *sa = aux;
141
142	return (strcmp(cf->cf_name, sa->sa_name) == 0);
143}
144
145
146void
147leattach_lebuffer(device_t parent, device_t self, void *aux)
148{
149	struct le_softc *lesc = device_private(self);
150	struct lance_softc *sc = &lesc->sc_am7990.lsc;
151	struct lebuf_softc *lebuf = device_private(parent);
152	struct sbus_attach_args *sa = aux;
153
154	sc->sc_dev = self;
155	lesc->sc_bustag = sa->sa_bustag;
156	lesc->sc_dmatag = sa->sa_dmatag;
157
158	if (sbus_bus_map(sa->sa_bustag,
159			 sa->sa_slot,
160			 sa->sa_offset,
161			 sa->sa_size,
162			 0, &lesc->sc_reg)) {
163		aprint_error(": cannot map registers\n");
164		return;
165	}
166
167	sc->sc_mem = lebuf->sc_buffer;
168	sc->sc_memsize = lebuf->sc_bufsiz;
169	sc->sc_addr = 0; /* Lance view is offset by buffer location */
170	lebuf->attached = 1;
171
172	/* That old black magic... */
173	sc->sc_conf3 = prom_getpropint(sa->sa_node, "busmaster-regval",
174				  LE_C3_BSWP | LE_C3_ACON | LE_C3_BCON);
175
176	/* Assume SBus is grandparent */
177	lesc->sc_sd.sd_reset = (void *)lance_reset;
178	sbus_establish(&lesc->sc_sd, parent);
179
180	sc->sc_supmedia = lemedia;
181	sc->sc_nsupmedia = NLEMEDIA;
182	sc->sc_defaultmedia = lemedia[0];
183
184	prom_getether(sa->sa_node, sc->sc_enaddr);
185
186	sc->sc_copytodesc = lance_copytobuf_contig;
187	sc->sc_copyfromdesc = lance_copyfrombuf_contig;
188	sc->sc_copytobuf = lance_copytobuf_contig;
189	sc->sc_copyfrombuf = lance_copyfrombuf_contig;
190	sc->sc_zerobuf = lance_zerobuf_contig;
191
192	sc->sc_rdcsr = lerdcsr;
193	sc->sc_wrcsr = lewrcsr;
194
195	am7990_config(&lesc->sc_am7990);
196
197	/* Establish interrupt handler */
198	if (sa->sa_nintr != 0)
199		(void)bus_intr_establish(lesc->sc_bustag, sa->sa_pri,
200					 IPL_NET, am7990_intr, sc);
201}
202