lebuffer.c revision 1.13 
1/*	$NetBSD: lebuffer.c,v 1.13 2002/03/20 17:52:41 eeh 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 1.13 2002/03/20 17:52:41 eeh Exp $");
41
42#include <sys/param.h>
43#include <sys/systm.h>
44#include <sys/kernel.h>
45#include <sys/errno.h>
46#include <sys/device.h>
47#include <sys/malloc.h>
48
49#include <machine/bus.h>
50#include <machine/autoconf.h>
51#include <machine/cpu.h>
52
53#include <dev/sbus/sbusvar.h>
54#include <dev/sbus/lebuffervar.h>
55
56int	lebufprint	__P((void *, const char *));
57int	lebufmatch	__P((struct device *, struct cfdata *, void *));
58void	lebufattach	__P((struct device *, struct device *, void *));
59
60struct cfattach lebuffer_ca = {
61	sizeof(struct lebuf_softc), lebufmatch, lebufattach
62};
63
64int
65lebufprint(aux, busname)
66	void *aux;
67	const char *busname;
68{
69	struct sbus_attach_args *sa = aux;
70	bus_space_tag_t t = sa->sa_bustag;
71	struct lebuf_softc *sc = t->cookie;
72
73	sa->sa_bustag = sc->sc_bustag;	/* XXX */
74	sbus_print(aux, busname);	/* XXX */
75	sa->sa_bustag = t;		/* XXX */
76	return (UNCONF);
77}
78
79int
80lebufmatch(parent, cf, aux)
81	struct device *parent;
82	struct cfdata *cf;
83	void *aux;
84{
85	struct sbus_attach_args *sa = aux;
86
87	return (strcmp(cf->cf_driver->cd_name, sa->sa_name) == 0);
88}
89
90/*
91 * Attach all the sub-devices we can find
92 */
93void
94lebufattach(parent, self, aux)
95	struct device *parent, *self;
96	void *aux;
97{
98	struct sbus_attach_args *sa = aux;
99	struct lebuf_softc *sc = (void *)self;
100	int node;
101	int sbusburst;
102	bus_space_tag_t sbt;
103	bus_space_handle_t bh;
104
105	sc->sc_bustag = sa->sa_bustag;
106	sc->sc_dmatag = sa->sa_dmatag;
107
108	if (sbus_bus_map(sa->sa_bustag,
109			 sa->sa_slot, sa->sa_offset, sa->sa_size,
110			 BUS_SPACE_MAP_LINEAR, &bh) != 0) {
111		printf("%s: attach: cannot map registers\n", self->dv_xname);
112		return;
113	}
114
115	/*
116	 * This device's "register space" is just a buffer where the
117	 * Lance ring-buffers can be stored. Note the buffer's location
118	 * and size, so the `le' driver can pick them up.
119	 */
120	sc->sc_buffer = bus_space_vaddr(sa->sa_bustag, bh);
121	sc->sc_bufsiz = sa->sa_size;
122
123	node = sc->sc_node = sa->sa_node;
124
125	/*
126	 * Get transfer burst size from PROM
127	 */
128	sbusburst = ((struct sbus_softc *)parent)->sc_burst;
129	if (sbusburst == 0)
130		sbusburst = SBUS_BURST_32 - 1; /* 1->16 */
131
132	sc->sc_burst = PROM_getpropint(node, "burst-sizes", -1);
133	if (sc->sc_burst == -1)
134		/* take SBus burst sizes */
135		sc->sc_burst = sbusburst;
136
137	/* Clamp at parent's burst sizes */
138	sc->sc_burst &= sbusburst;
139
140	sbus_establish(&sc->sc_sd, &sc->sc_dev);
141
142	/* Allocate a bus tag */
143	sbt = (bus_space_tag_t) malloc(sizeof(struct sparc_bus_space_tag),
144	    M_DEVBUF, M_NOWAIT|M_ZERO);
145	if (sbt == NULL) {
146		printf("%s: attach: out of memory\n", self->dv_xname);
147		return;
148	}
149
150	printf(": %dK memory\n", sc->sc_bufsiz / 1024);
151
152	sbt->cookie = sc;
153	sbt->parent = sc->sc_bustag;
154
155	/* search through children */
156	for (node = firstchild(node); node; node = nextsibling(node)) {
157		struct sbus_attach_args sa;
158		sbus_setup_attach_args((struct sbus_softc *)parent,
159				       sbt, sc->sc_dmatag, node, &sa);
160		(void)config_found(&sc->sc_dev, (void *)&sa, lebufprint);
161		sbus_destroy_attach_args(&sa);
162	}
163}
164