1 /* $OpenBSD: lebuffer.c,v 1.11 2022/03/13 13:34:54 mpi 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 *
20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/kernel.h>
36 #include <sys/errno.h>
37 #include <sys/device.h>
38 #include <sys/malloc.h>
39
40 #include <machine/bus.h>
41 #include <machine/autoconf.h>
42 #include <machine/cpu.h>
43
44 #include <dev/sbus/sbusvar.h>
45 #include <dev/sbus/lebuffervar.h>
46
47 int lebufprint(void *, const char *);
48 int lebufmatch(struct device *, void *, void *);
49 void lebufattach(struct device *, struct device *, void *);
50
51 const struct cfattach lebuffer_ca = {
52 sizeof(struct lebuf_softc), lebufmatch, lebufattach
53 };
54
55 int
lebufprint(void * aux,const char * busname)56 lebufprint(void *aux, const char *busname)
57 {
58 struct sbus_attach_args *sa = aux;
59 bus_space_tag_t t = sa->sa_bustag;
60 struct lebuf_softc *sc = t->cookie;
61
62 sa->sa_bustag = sc->sc_bustag; /* XXX */
63 sbus_print(aux, busname); /* XXX */
64 sa->sa_bustag = t; /* XXX */
65 return (UNCONF);
66 }
67
68 int
lebufmatch(struct device * parent,void * vcf,void * aux)69 lebufmatch(struct device *parent, void *vcf, void *aux)
70 {
71 struct sbus_attach_args *sa = aux;
72 struct cfdata *cf = vcf;
73
74 return (strcmp(cf->cf_driver->cd_name, sa->sa_name) == 0);
75 }
76
77 /*
78 * Attach all the sub-devices we can find
79 */
80 void
lebufattach(struct device * parent,struct device * self,void * aux)81 lebufattach(struct device *parent, struct device *self, void *aux)
82 {
83 struct sbus_attach_args *sa = aux;
84 struct lebuf_softc *sc = (void *)self;
85 int node;
86 int sbusburst;
87 struct sparc_bus_space_tag *sbt;
88 bus_space_handle_t bh;
89
90 sc->sc_bustag = sa->sa_bustag;
91 sc->sc_dmatag = sa->sa_dmatag;
92
93 if (sbus_bus_map(sa->sa_bustag,
94 sa->sa_slot, sa->sa_offset, sa->sa_size,
95 BUS_SPACE_MAP_LINEAR, 0, &bh) != 0) {
96 printf("%s: attach: cannot map registers\n", self->dv_xname);
97 return;
98 }
99
100 /*
101 * This device's "register space" is just a buffer where the
102 * Lance ring-buffers can be stored. Note the buffer's location
103 * and size, so the `le' driver can pick them up.
104 */
105 sc->sc_buffer = (void *)bus_space_vaddr(sa->sa_bustag, bh);
106 sc->sc_bufsiz = sa->sa_size;
107
108 node = sc->sc_node = sa->sa_node;
109
110 /*
111 * Get transfer burst size from PROM
112 */
113 sbusburst = ((struct sbus_softc *)parent)->sc_burst;
114 if (sbusburst == 0)
115 sbusburst = SBUS_BURST_32 - 1; /* 1->16 */
116
117 sc->sc_burst = getpropint(node, "burst-sizes", -1);
118 if (sc->sc_burst == -1)
119 /* take SBus burst sizes */
120 sc->sc_burst = sbusburst;
121
122 /* Clamp at parent's burst sizes */
123 sc->sc_burst &= sbusburst;
124
125 /* Allocate a bus tag */
126 sbt = malloc(sizeof(*sbt), M_DEVBUF, M_NOWAIT | M_ZERO);
127 if (sbt == NULL) {
128 printf("%s: attach: out of memory\n", self->dv_xname);
129 return;
130 }
131
132 printf(": %dK memory\n", sc->sc_bufsiz / 1024);
133
134 sbt->cookie = sc;
135 sbt->parent = sc->sc_bustag;
136 sbt->asi = sbt->parent->asi;
137 sbt->sasi = sbt->parent->sasi;
138
139 /* search through children */
140 for (node = firstchild(node); node; node = nextsibling(node)) {
141 struct sbus_attach_args sa;
142 sbus_setup_attach_args((struct sbus_softc *)parent,
143 sbt, sc->sc_dmatag, node, &sa);
144 (void)config_found(&sc->sc_dev, (void *)&sa, lebufprint);
145 sbus_destroy_attach_args(&sa);
146 }
147 }
148