if_le_lebuffer.c revision 1.13 
1/*	$NetBSD: if_le_lebuffer.c,v 1.13 2002/09/27 20:41:29 thorpej 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 * 3. All advertising materials mentioning features or use of this software
20 *    must display the following acknowledgement:
21 *	This product includes software developed by the NetBSD
22 *	Foundation, Inc. and its contributors.
23 * 4. Neither the name of The NetBSD Foundation nor the names of its
24 *    contributors may be used to endorse or promote products derived
25 *    from this software without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
30 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
37 * POSSIBILITY OF SUCH DAMAGE.
38 */
39
40#include <sys/cdefs.h>
41__KERNEL_RCSID(0, "$NetBSD: if_le_lebuffer.c,v 1.13 2002/09/27 20:41:29 thorpej Exp $");
42
43#include "opt_inet.h"
44#include "bpfilter.h"
45
46#include <sys/param.h>
47#include <sys/systm.h>
48#include <sys/mbuf.h>
49#include <sys/syslog.h>
50#include <sys/socket.h>
51#include <sys/device.h>
52#include <sys/malloc.h>
53
54#include <net/if.h>
55#include <net/if_ether.h>
56#include <net/if_media.h>
57
58#ifdef INET
59#include <netinet/in.h>
60#include <netinet/if_inarp.h>
61#endif
62
63#include <machine/bus.h>
64#include <machine/intr.h>
65#include <machine/autoconf.h>
66
67#include <dev/sbus/sbusvar.h>
68#include <dev/sbus/lebuffervar.h>
69
70#include <dev/ic/lancereg.h>
71#include <dev/ic/lancevar.h>
72#include <dev/ic/am7990reg.h>
73#include <dev/ic/am7990var.h>
74
75/*
76 * LANCE registers.
77 */
78#define LEREG1_RDP	0	/* Register Data port */
79#define LEREG1_RAP	2	/* Register Address port */
80
81struct	le_softc {
82	struct	am7990_softc	sc_am7990;	/* glue to MI code */
83	struct	sbusdev		sc_sd;		/* sbus device */
84	bus_space_tag_t		sc_bustag;
85	bus_dma_tag_t		sc_dmatag;
86	bus_space_handle_t	sc_reg;		/* LANCE registers */
87};
88
89
90int	lematch_lebuffer __P((struct device *, struct cfdata *, void *));
91void	leattach_lebuffer __P((struct device *, struct device *, void *));
92
93/*
94 * Media types supported.
95 */
96static int lemedia[] = {
97	IFM_ETHER|IFM_10_T,
98};
99#define NLEMEDIA	(sizeof(lemedia) / sizeof(lemedia[0]))
100
101const struct cfattach le_lebuffer_ca = {
102	sizeof(struct le_softc), lematch_lebuffer, leattach_lebuffer
103};
104
105extern struct cfdriver le_cd;
106
107#if defined(_KERNEL_OPT)
108#include "opt_ddb.h"
109#endif
110
111#ifdef DDB
112#define	integrate
113#define hide
114#else
115#define	integrate	static __inline
116#define hide		static
117#endif
118
119static void lewrcsr __P((struct lance_softc *, u_int16_t, u_int16_t));
120static u_int16_t lerdcsr __P((struct lance_softc *, u_int16_t));
121
122static void
123lewrcsr(sc, port, val)
124	struct lance_softc *sc;
125	u_int16_t port, val;
126{
127	struct le_softc *lesc = (struct le_softc *)sc;
128
129	bus_space_write_2(lesc->sc_bustag, lesc->sc_reg, LEREG1_RAP, port);
130	bus_space_write_2(lesc->sc_bustag, lesc->sc_reg, LEREG1_RDP, val);
131
132#if defined(SUN4M)
133	/*
134	 * We need to flush the Sbus->Mbus write buffers. This can most
135	 * easily be accomplished by reading back the register that we
136	 * just wrote (thanks to Chris Torek for this solution).
137	 */
138	if (CPU_ISSUN4M) {
139		volatile u_int16_t discard;
140		discard = bus_space_read_2(lesc->sc_bustag, lesc->sc_reg,
141					   LEREG1_RDP);
142	}
143#endif
144}
145
146static u_int16_t
147lerdcsr(sc, port)
148	struct lance_softc *sc;
149	u_int16_t port;
150{
151	struct le_softc *lesc = (struct le_softc *)sc;
152
153	bus_space_write_2(lesc->sc_bustag, lesc->sc_reg, LEREG1_RAP, port);
154	return (bus_space_read_2(lesc->sc_bustag, lesc->sc_reg, LEREG1_RDP));
155}
156
157int
158lematch_lebuffer(parent, cf, aux)
159	struct device *parent;
160	struct cfdata *cf;
161	void *aux;
162{
163	struct sbus_attach_args *sa = aux;
164
165	return (strcmp(cf->cf_name, sa->sa_name) == 0);
166}
167
168
169void
170leattach_lebuffer(parent, self, aux)
171	struct device *parent, *self;
172	void *aux;
173{
174	struct sbus_attach_args *sa = aux;
175	struct le_softc *lesc = (struct le_softc *)self;
176	struct lance_softc *sc = &lesc->sc_am7990.lsc;
177	struct lebuf_softc *lebuf = (struct lebuf_softc *)parent;
178	/* XXX the following declarations should be elsewhere */
179	extern void myetheraddr __P((u_char *));
180
181	lesc->sc_bustag = sa->sa_bustag;
182	lesc->sc_dmatag = sa->sa_dmatag;
183
184	if (sbus_bus_map(sa->sa_bustag,
185			 sa->sa_slot,
186			 sa->sa_offset,
187			 sa->sa_size,
188			 0, &lesc->sc_reg)) {
189		printf("%s @ lebuffer: cannot map registers\n", self->dv_xname);
190		return;
191	}
192
193	sc->sc_mem = lebuf->sc_buffer;
194	sc->sc_memsize = lebuf->sc_bufsiz;
195	sc->sc_addr = 0; /* Lance view is offset by buffer location */
196	lebuf->attached = 1;
197
198	/* That old black magic... */
199	sc->sc_conf3 = PROM_getpropint(sa->sa_node, "busmaster-regval",
200				  LE_C3_BSWP | LE_C3_ACON | LE_C3_BCON);
201
202	/* Assume SBus is grandparent */
203	lesc->sc_sd.sd_reset = (void *)lance_reset;
204	sbus_establish(&lesc->sc_sd, parent);
205
206	sc->sc_supmedia = lemedia;
207	sc->sc_nsupmedia = NLEMEDIA;
208	sc->sc_defaultmedia = lemedia[0];
209
210	myetheraddr(sc->sc_enaddr);
211
212	sc->sc_copytodesc = lance_copytobuf_contig;
213	sc->sc_copyfromdesc = lance_copyfrombuf_contig;
214	sc->sc_copytobuf = lance_copytobuf_contig;
215	sc->sc_copyfrombuf = lance_copyfrombuf_contig;
216	sc->sc_zerobuf = lance_zerobuf_contig;
217
218	sc->sc_rdcsr = lerdcsr;
219	sc->sc_wrcsr = lewrcsr;
220
221	am7990_config(&lesc->sc_am7990);
222
223	/* Establish interrupt handler */
224	if (sa->sa_nintr != 0)
225		(void)bus_intr_establish(lesc->sc_bustag, sa->sa_pri,
226					 IPL_NET, 0, am7990_intr, sc);
227}
228