lebuffer.c revision 1.4 
1/*	$NetBSD: lebuffer.c,v 1.4 1998/07/29 18:33:27 pk 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/types.h>
40#include <sys/param.h>
41#include <sys/systm.h>
42#include <sys/kernel.h>
43#include <sys/errno.h>
44#include <sys/ioctl.h>
45#include <sys/device.h>
46#include <sys/malloc.h>
47#include <sys/buf.h>
48#include <sys/proc.h>
49#include <sys/user.h>
50
51#include <machine/bus.h>
52#include <machine/autoconf.h>
53#include <machine/cpu.h>
54
55#include <dev/sbus/sbusvar.h>
56#include <dev/sbus/lebuffervar.h>
57
58int	lebufprint	__P((void *, const char *));
59int	lebufmatch	__P((struct device *, struct cfdata *, void *));
60void	lebufattach	__P((struct device *, struct device *, void *));
61
62struct cfattach lebuffer_ca = {
63	sizeof(struct lebuf_softc), lebufmatch, lebufattach
64};
65
66int
67lebufprint(aux, busname)
68	void *aux;
69	const char *busname;
70{
71	struct sbus_attach_args *sa = aux;
72	bus_space_tag_t t = sa->sa_bustag;
73	struct lebuf_softc *sc = t->cookie;
74
75	sa->sa_bustag = sc->sc_bustag;	/* XXX */
76	sbus_print(aux, busname);	/* XXX */
77	sa->sa_bustag = t;		/* XXX */
78	return (UNCONF);
79}
80
81int
82lebufmatch(parent, cf, aux)
83	struct device *parent;
84	struct cfdata *cf;
85	void *aux;
86{
87	struct sbus_attach_args *sa = aux;
88
89	return (strcmp(cf->cf_driver->cd_name, sa->sa_name) == 0);
90}
91
92/*
93 * Attach all the sub-devices we can find
94 */
95void
96lebufattach(parent, self, aux)
97	struct device *parent, *self;
98	void *aux;
99{
100	struct sbus_attach_args *sa = aux;
101	struct lebuf_softc *sc = (void *)self;
102	int node;
103	int sbusburst;
104	bus_space_tag_t sbt;
105	bus_space_handle_t bh;
106	struct bootpath *bp;
107
108	sc->sc_bustag = sa->sa_bustag;
109	sc->sc_dmatag = sa->sa_dmatag;
110
111	if (sbus_bus_map(sa->sa_bustag, sa->sa_slot,
112			 sa->sa_offset,
113			 sa->sa_size,
114			 0, 0, &bh) != 0) {
115		printf("%s: attach: cannot map registers\n", self->dv_xname);
116		return;
117	}
118
119	/*
120	 * This device's "register space" is just a buffer where the
121	 * Lance ring-buffers can be stored. Note the buffer's location
122	 * and size, so the `le' driver can pick them up.
123	 */
124	sc->sc_buffer = (caddr_t)bh;
125	sc->sc_bufsiz = sa->sa_size;
126
127	node = sc->sc_node = sa->sa_node;
128
129	/*
130	 * Get transfer burst size from PROM
131	 */
132	sbusburst = ((struct sbus_softc *)parent)->sc_burst;
133	if (sbusburst == 0)
134		sbusburst = SBUS_BURST_32 - 1; /* 1->16 */
135
136	sc->sc_burst = getpropint(node, "burst-sizes", -1);
137	if (sc->sc_burst == -1)
138		/* take SBus burst sizes */
139		sc->sc_burst = sbusburst;
140
141	/* Clamp at parent's burst sizes */
142	sc->sc_burst &= sbusburst;
143
144	sbus_establish(&sc->sc_sd, &sc->sc_dev);
145
146	/* Propagate bootpath */
147	if (sa->sa_bp != NULL)
148		bp = sa->sa_bp + 1;
149	else
150		bp = NULL;
151
152	/* Allocate a bus tag */
153	sbt = (bus_space_tag_t)
154		malloc(sizeof(struct sparc_bus_space_tag), M_DEVBUF, M_NOWAIT);
155	if (sbt == NULL) {
156		printf("%s: attach: out of memory\n", self->dv_xname);
157		return;
158	}
159
160	printf(": %dK memory\n", sc->sc_bufsiz / 1024);
161
162	bzero(sbt, sizeof *sbt);
163	sbt->cookie = sc;
164	sbt->parent = sc->sc_bustag;
165
166	/* search through children */
167	for (node = firstchild(node); node; node = nextsibling(node)) {
168		struct sbus_attach_args sa;
169		sbus_setup_attach_args((struct sbus_softc *)parent,
170				       sbt, sc->sc_dmatag, node, bp, &sa);
171		(void)config_found(&sc->sc_dev, (void *)&sa, lebufprint);
172		sbus_destroy_attach_args(&sa);
173	}
174}
175