lebuffer.c revision 1.9 
1/*	$NetBSD: lebuffer.c,v 1.9 2001/11/13 06:58:17 lukem Exp $ */
2
3/*-
4 * Copyright (c) 1998 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Paul Kranenburg.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 *    must display the following acknowledgement:
20 *        This product includes software developed by the NetBSD
21 *        Foundation, Inc. and its contributors.
22 * 4. Neither the name of The NetBSD Foundation nor the names of its
23 *    contributors may be used to endorse or promote products derived
24 *    from this software without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
37 */
38
39#include <sys/cdefs.h>
40__KERNEL_RCSID(0, "$NetBSD: lebuffer.c,v 1.9 2001/11/13 06:58:17 lukem Exp $");
41
42#include <sys/types.h>
43#include <sys/param.h>
44#include <sys/systm.h>
45#include <sys/kernel.h>
46#include <sys/errno.h>
47#include <sys/device.h>
48#include <sys/malloc.h>
49
50#include <machine/bus.h>
51#include <machine/autoconf.h>
52#include <machine/cpu.h>
53
54#include <dev/sbus/sbusvar.h>
55#include <dev/sbus/lebuffervar.h>
56
57int	lebufprint	__P((void *, const char *));
58int	lebufmatch	__P((struct device *, struct cfdata *, void *));
59void	lebufattach	__P((struct device *, struct device *, void *));
60
61struct cfattach lebuffer_ca = {
62	sizeof(struct lebuf_softc), lebufmatch, lebufattach
63};
64
65int
66lebufprint(aux, busname)
67	void *aux;
68	const char *busname;
69{
70	struct sbus_attach_args *sa = aux;
71	bus_space_tag_t t = sa->sa_bustag;
72	struct lebuf_softc *sc = t->cookie;
73
74	sa->sa_bustag = sc->sc_bustag;	/* XXX */
75	sbus_print(aux, busname);	/* XXX */
76	sa->sa_bustag = t;		/* XXX */
77	return (UNCONF);
78}
79
80int
81lebufmatch(parent, cf, aux)
82	struct device *parent;
83	struct cfdata *cf;
84	void *aux;
85{
86	struct sbus_attach_args *sa = aux;
87
88	return (strcmp(cf->cf_driver->cd_name, sa->sa_name) == 0);
89}
90
91/*
92 * Attach all the sub-devices we can find
93 */
94void
95lebufattach(parent, self, aux)
96	struct device *parent, *self;
97	void *aux;
98{
99	struct sbus_attach_args *sa = aux;
100	struct lebuf_softc *sc = (void *)self;
101	int node;
102	int sbusburst;
103	bus_space_tag_t sbt;
104	bus_space_handle_t bh;
105
106	sc->sc_bustag = sa->sa_bustag;
107	sc->sc_dmatag = sa->sa_dmatag;
108
109	if (sbus_bus_map(sa->sa_bustag, sa->sa_slot,
110			 sa->sa_offset,
111			 sa->sa_size,
112			 0, 0, &bh) != 0) {
113		printf("%s: attach: cannot map registers\n", self->dv_xname);
114		return;
115	}
116
117	/*
118	 * This device's "register space" is just a buffer where the
119	 * Lance ring-buffers can be stored. Note the buffer's location
120	 * and size, so the `le' driver can pick them up.
121	 */
122	sc->sc_buffer = (caddr_t)(u_long)bh;
123	sc->sc_bufsiz = sa->sa_size;
124
125	node = sc->sc_node = sa->sa_node;
126
127	/*
128	 * Get transfer burst size from PROM
129	 */
130	sbusburst = ((struct sbus_softc *)parent)->sc_burst;
131	if (sbusburst == 0)
132		sbusburst = SBUS_BURST_32 - 1; /* 1->16 */
133
134	sc->sc_burst = PROM_getpropint(node, "burst-sizes", -1);
135	if (sc->sc_burst == -1)
136		/* take SBus burst sizes */
137		sc->sc_burst = sbusburst;
138
139	/* Clamp at parent's burst sizes */
140	sc->sc_burst &= sbusburst;
141
142	sbus_establish(&sc->sc_sd, &sc->sc_dev);
143
144	/* Allocate a bus tag */
145	sbt = (bus_space_tag_t)
146		malloc(sizeof(struct sparc_bus_space_tag), M_DEVBUF, M_NOWAIT);
147	if (sbt == NULL) {
148		printf("%s: attach: out of memory\n", self->dv_xname);
149		return;
150	}
151
152	printf(": %dK memory\n", sc->sc_bufsiz / 1024);
153
154	bzero(sbt, sizeof *sbt);
155	sbt->cookie = sc;
156	sbt->parent = sc->sc_bustag;
157
158	/* search through children */
159	for (node = firstchild(node); node; node = nextsibling(node)) {
160		struct sbus_attach_args sa;
161		sbus_setup_attach_args((struct sbus_softc *)parent,
162				       sbt, sc->sc_dmatag, node, &sa);
163		(void)config_found(&sc->sc_dev, (void *)&sa, lebufprint);
164		sbus_destroy_attach_args(&sa);
165	}
166}
167