1 /* $OpenBSD: lebuffer.c,v 1.6 2006/06/02 20:00:56 miod Exp $ */
2 /* $NetBSD: lebuffer.c,v 1.12 2002/03/11 16:00:57 pk Exp $ */
3
4 /*-
5 * Copyright (c) 1998 The NetBSD Foundation, Inc.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to The NetBSD Foundation
9 * by 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 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/kernel.h>
44 #include <sys/errno.h>
45 #include <sys/device.h>
46 #include <sys/malloc.h>
47
48 #include <machine/bus.h>
49 #include <machine/autoconf.h>
50 #include <machine/cpu.h>
51
52 #include <dev/sbus/sbusvar.h>
53 #include <dev/sbus/lebuffervar.h>
54
55 int lebufprint(void *, const char *);
56 int lebufmatch(struct device *, void *, void *);
57 void lebufattach(struct device *, struct device *, void *);
58
59 struct cfattach lebuffer_ca = {
60 sizeof(struct lebuf_softc), lebufmatch, lebufattach
61 };
62
63 int
64 lebufprint(void *aux, const char *busname)
65 {
66 struct sbus_attach_args *sa = aux;
67 bus_space_tag_t t = sa->sa_bustag;
68 struct lebuf_softc *sc = t->cookie;
69
70 sa->sa_bustag = sc->sc_bustag; /* XXX */
71 sbus_print(aux, busname); /* XXX */
72 sa->sa_bustag = t; /* XXX */
73 return (UNCONF);
74 }
75
76 int
77 lebufmatch(struct device *parent, void *vcf, void *aux)
78 {
79 struct sbus_attach_args *sa = aux;
80 struct cfdata *cf = vcf;
81
82 return (strcmp(cf->cf_driver->cd_name, sa->sa_name) == 0);
83 }
84
85 /*
86 * Attach all the sub-devices we can find
87 */
88 void
89 lebufattach(struct device *parent, struct device *self, void *aux)
90 {
91 struct sbus_attach_args *sa = aux;
92 struct lebuf_softc *sc = (void *)self;
93 int node;
94 int sbusburst;
95 struct sparc_bus_space_tag *sbt;
96 bus_space_handle_t bh;
97
98 sc->sc_bustag = sa->sa_bustag;
99 sc->sc_dmatag = sa->sa_dmatag;
100
101 if (sbus_bus_map(sa->sa_bustag,
102 sa->sa_slot, sa->sa_offset, sa->sa_size,
103 BUS_SPACE_MAP_LINEAR, 0, &bh) != 0) {
104 printf("%s: attach: cannot map registers\n", self->dv_xname);
105 return;
106 }
107
108 /*
109 * This device's "register space" is just a buffer where the
110 * Lance ring-buffers can be stored. Note the buffer's location
111 * and size, so the `le' driver can pick them up.
112 */
113 sc->sc_buffer = (void *)bus_space_vaddr(sa->sa_bustag, bh);
114 sc->sc_bufsiz = sa->sa_size;
115
116 node = sc->sc_node = sa->sa_node;
117
118 /*
119 * Get transfer burst size from PROM
120 */
121 sbusburst = ((struct sbus_softc *)parent)->sc_burst;
122 if (sbusburst == 0)
123 sbusburst = SBUS_BURST_32 - 1; /* 1->16 */
124
125 sc->sc_burst = getpropint(node, "burst-sizes", -1);
126 if (sc->sc_burst == -1)
127 /* take SBus burst sizes */
128 sc->sc_burst = sbusburst;
129
130 /* Clamp at parent's burst sizes */
131 sc->sc_burst &= sbusburst;
132
133 /* Allocate a bus tag */
134 sbt = malloc(sizeof(*sbt), M_DEVBUF, M_NOWAIT);
135 if (sbt == NULL) {
136 printf("%s: attach: out of memory\n", self->dv_xname);
137 return;
138 }
139 bzero(sbt, sizeof(*sbt));
140
141 printf(": %dK memory\n", sc->sc_bufsiz / 1024);
142
143 sbt->cookie = sc;
144 sbt->parent = sc->sc_bustag;
145 sbt->asi = sbt->parent->asi;
146 sbt->sasi = sbt->parent->sasi;
147
148 /* search through children */
149 for (node = firstchild(node); node; node = nextsibling(node)) {
150 struct sbus_attach_args sa;
151 sbus_setup_attach_args((struct sbus_softc *)parent,
152 sbt, sc->sc_dmatag, node, &sa);
153 (void)config_found(&sc->sc_dev, (void *)&sa, lebufprint);
154 sbus_destroy_attach_args(&sa);
155 }
156 }