lebuffer.c revision 1.28 
1/*	$NetBSD: lebuffer.c,v 1.28 2008/04/28 20:23:57 martin 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 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33__KERNEL_RCSID(0, "$NetBSD: lebuffer.c,v 1.28 2008/04/28 20:23:57 martin Exp $");
34
35#include <sys/param.h>
36#include <sys/systm.h>
37#include <sys/kernel.h>
38#include <sys/errno.h>
39#include <sys/device.h>
40#include <sys/malloc.h>
41
42#include <sys/bus.h>
43#include <machine/autoconf.h>
44#include <sys/cpu.h>
45
46#include <dev/sbus/sbusvar.h>
47#include <dev/sbus/lebuffervar.h>
48
49int	lebufprint(void *, const char *);
50int	lebufmatch(struct device *, struct cfdata *, void *);
51void	lebufattach(struct device *, struct device *, void *);
52
53CFATTACH_DECL(lebuffer, sizeof(struct lebuf_softc),
54    lebufmatch, lebufattach, NULL, NULL);
55
56int
57lebufprint(aux, busname)
58	void *aux;
59	const char *busname;
60{
61
62	sbus_print(aux, busname);
63	return (UNCONF);
64}
65
66int
67lebufmatch(parent, cf, aux)
68	struct device *parent;
69	struct cfdata *cf;
70	void *aux;
71{
72	struct sbus_attach_args *sa = aux;
73
74	return (strcmp(cf->cf_name, sa->sa_name) == 0);
75}
76
77/*
78 * Attach all the sub-devices we can find
79 */
80void
81lebufattach(parent, self, aux)
82	struct device *parent, *self;
83	void *aux;
84{
85	struct sbus_attach_args *sa = aux;
86	struct lebuf_softc *sc = (void *)self;
87	int node;
88	int sbusburst;
89	bus_space_tag_t bt = sa->sa_bustag;
90	bus_dma_tag_t	dt = sa->sa_dmatag;
91	bus_space_handle_t bh;
92
93	if (sbus_bus_map(bt, sa->sa_slot, sa->sa_offset, sa->sa_size,
94			 BUS_SPACE_MAP_LINEAR, &bh) != 0) {
95		aprint_error_dev(self, "attach: cannot map registers\n");
96		return;
97	}
98
99	/*
100	 * This device's "register space" is just a buffer where the
101	 * Lance ring-buffers can be stored. Note the buffer's location
102	 * and size, so the `le' driver can pick them up.
103	 */
104	sc->sc_buffer = bus_space_vaddr(bt, bh);
105	sc->sc_bufsiz = sa->sa_size;
106
107	node = sc->sc_node = sa->sa_node;
108
109	/*
110	 * Get transfer burst size from PROM
111	 */
112	sbusburst = ((struct sbus_softc *)parent)->sc_burst;
113	if (sbusburst == 0)
114		sbusburst = SBUS_BURST_32 - 1; /* 1->16 */
115
116	sc->sc_burst = prom_getpropint(node, "burst-sizes", -1);
117	if (sc->sc_burst == -1)
118		/* take SBus burst sizes */
119		sc->sc_burst = sbusburst;
120
121	/* Clamp at parent's burst sizes */
122	sc->sc_burst &= sbusburst;
123
124	sbus_establish(&sc->sc_sd, &sc->sc_dev);
125
126	printf(": %dK memory\n", sc->sc_bufsiz / 1024);
127
128	/* search through children */
129	for (node = firstchild(node); node; node = nextsibling(node)) {
130		struct sbus_attach_args sax;
131		sbus_setup_attach_args((struct sbus_softc *)parent,
132				       bt, dt, node, &sax);
133		(void)config_found(&sc->sc_dev, (void *)&sax, lebufprint);
134		sbus_destroy_attach_args(&sax);
135	}
136}
137