1 /* $NetBSD: lebuffer.c,v 1.41 2022/09/25 18:03:04 thorpej 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 1.41 2022/09/25 18:03:04 thorpej 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
41 #include <sys/bus.h>
42 #include <machine/autoconf.h>
43 #include <sys/cpu.h>
44
45 #include <dev/sbus/sbusvar.h>
46 #include <dev/sbus/lebuffervar.h>
47
48 int lebufprint(void *, const char *);
49 int lebufmatch(device_t, cfdata_t, void *);
50 void lebufattach(device_t, device_t, void *);
51
52 CFATTACH_DECL_NEW(lebuffer, sizeof(struct lebuf_softc),
53 lebufmatch, lebufattach, NULL, NULL);
54
55 int
lebufprint(void * aux,const char * busname)56 lebufprint(void *aux, const char *busname)
57 {
58
59 sbus_print(aux, busname);
60 return (UNCONF);
61 }
62
63 int
lebufmatch(device_t parent,cfdata_t cf,void * aux)64 lebufmatch(device_t parent, cfdata_t cf, void *aux)
65 {
66 struct sbus_attach_args *sa = aux;
67
68 return (strcmp(cf->cf_name, sa->sa_name) == 0);
69 }
70
71 /*
72 * Attach all the sub-devices we can find
73 */
74 void
lebufattach(device_t parent,device_t self,void * aux)75 lebufattach(device_t parent, device_t self, void *aux)
76 {
77 struct sbus_attach_args *sa = aux;
78 struct lebuf_softc *sc = device_private(self);
79 struct sbus_softc *sbsc = device_private(parent);
80 int node;
81 int sbusburst;
82 bus_space_tag_t bt = sa->sa_bustag;
83 bus_dma_tag_t dt = sa->sa_dmatag;
84 bus_space_handle_t bh;
85
86 sc->sc_dev = self;
87
88 if (sbus_bus_map(bt, sa->sa_slot, sa->sa_offset, sa->sa_size,
89 BUS_SPACE_MAP_LINEAR, &bh) != 0) {
90 aprint_error(": cannot map registers\n");
91 return;
92 }
93
94 /*
95 * This device's "register space" is just a buffer where the
96 * Lance ring-buffers can be stored. Note the buffer's location
97 * and size, so the `le' driver can pick them up.
98 */
99 sc->sc_buffer = bus_space_vaddr(bt, bh);
100 sc->sc_bufsiz = sa->sa_size;
101
102 node = sc->sc_node = sa->sa_node;
103
104 /*
105 * Get transfer burst size from PROM
106 */
107 sbusburst = sbsc->sc_burst;
108 if (sbusburst == 0)
109 sbusburst = SBUS_BURST_32 - 1; /* 1->16 */
110
111 sc->sc_burst = prom_getpropint(node, "burst-sizes", -1);
112 if (sc->sc_burst == -1)
113 /* take SBus burst sizes */
114 sc->sc_burst = sbusburst;
115
116 /* Clamp at parent's burst sizes */
117 sc->sc_burst &= sbusburst;
118
119 printf(": %dK memory\n", sc->sc_bufsiz / 1024);
120
121 /* search through children */
122 devhandle_t selfh = device_handle(self);
123 for (node = firstchild(node); node; node = nextsibling(node)) {
124 struct sbus_attach_args sax;
125 sbus_setup_attach_args(sbsc,
126 bt, dt, node, &sax);
127 (void)config_found(self, (void *)&sax, lebufprint,
128 CFARGS(.devhandle = prom_node_to_devhandle(selfh, node)));
129 sbus_destroy_attach_args(&sax);
130 }
131 }
132