1/*	$NetBSD: central.c,v 1.9 2022/01/22 11:49:17 thorpej Exp $	*/
2/*	$OpenBSD: central.c,v 1.7 2010/11/11 17:58:23 miod Exp $	*/
3
4/*
5 * Copyright (c) 2004 Jason L. Wright (jason@thought.net)
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20 * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
21 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
25 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
26 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
27 * POSSIBILITY OF SUCH DAMAGE.
28 */
29
30#include <sys/cdefs.h>
31__KERNEL_RCSID(0, "$NetBSD: central.c,v 1.9 2022/01/22 11:49:17 thorpej Exp $");
32
33#include <sys/types.h>
34#include <sys/param.h>
35#include <sys/systm.h>
36#include <sys/kernel.h>
37#include <sys/device.h>
38#include <sys/conf.h>
39#include <sys/malloc.h>
40#include <sys/kmem.h>
41#include <sys/bus.h>
42
43#include <machine/autoconf.h>
44#include <machine/openfirm.h>
45
46#include <sparc64/dev/centralvar.h>
47
48struct central_softc {
49	bus_space_tag_t sc_bt;
50	bus_space_tag_t sc_cbt;
51	int sc_node;
52	int sc_nrange;
53	struct central_range *sc_range;
54};
55
56static int central_match(device_t, cfdata_t, void *);
57static void central_attach(device_t, device_t, void *);
58
59CFATTACH_DECL_NEW(central, sizeof(struct central_softc),
60    central_match, central_attach, NULL, NULL);
61
62static int central_print(void *, const char *);
63static int central_get_string(int, const char *, char **);
64
65static bus_space_tag_t central_alloc_bus_tag(struct central_softc *);
66static int _central_bus_map(
67		bus_space_tag_t,
68		bus_addr_t,		/*offset*/
69		bus_size_t,		/*size*/
70		int,			/*flags*/
71		vaddr_t,		/* XXX unused -- compat w/sparc */
72		bus_space_handle_t *);
73
74static int
75central_match(device_t parent, cfdata_t match, void *aux)
76{
77	struct mainbus_attach_args *ma = aux;
78
79	if (strcmp(ma->ma_name, "central") == 0)
80		return (1);
81	return (0);
82}
83
84static void
85central_attach(device_t parent, device_t self, void *aux)
86{
87	struct central_softc *sc = device_private(self);
88	struct mainbus_attach_args *ma = aux;
89	int node0, node;
90
91	sc->sc_bt = ma->ma_bustag;
92	sc->sc_node = ma->ma_node;
93	sc->sc_cbt = central_alloc_bus_tag(sc);
94
95	prom_getprop(sc->sc_node, "ranges", sizeof(struct central_range),
96	    &sc->sc_nrange, (void **)&sc->sc_range);
97
98	printf("\n");
99
100	devhandle_t selfh = device_handle(self);
101	node0 = firstchild(sc->sc_node);
102	for (node = node0; node; node = nextsibling(node)) {
103		struct central_attach_args ca;
104
105		bzero(&ca, sizeof(ca));
106		ca.ca_node = node;
107		ca.ca_bustag = sc->sc_cbt;
108		if (central_get_string(ca.ca_node, "name", &ca.ca_name)) {
109			printf("can't fetch name for node 0x%x\n", node);
110			continue;
111		}
112
113		prom_getprop(node, "reg", sizeof(struct central_reg),
114		    &ca.ca_nreg, (void **)&ca.ca_reg);
115
116		(void)config_found(self, (void *)&ca, central_print,
117		    CFARGS(.devhandle = prom_node_to_devhandle(selfh,
118							       ca.ca_node)));
119
120		if (ca.ca_name != NULL)
121			free(ca.ca_name, M_DEVBUF);
122	}
123}
124
125static int
126central_get_string(int node, const char *name, char **buf)
127{
128	int len;
129
130	len = prom_getproplen(node, name);
131	if (len < 0)
132		return (len);
133	*buf = malloc(len + 1, M_DEVBUF, M_WAITOK);
134	if (len != 0)
135		prom_getpropstringA(node, name, *buf, len + 1);
136	(*buf)[len] = '\0';
137	return (0);
138}
139
140static int
141central_print(void *args, const char *busname)
142{
143	struct central_attach_args *ca = args;
144	char *class;
145
146	if (busname != NULL) {
147		printf("\"%s\" at %s", ca->ca_name, busname);
148		class = prom_getpropstring(ca->ca_node, "device_type");
149		if (*class != '\0')
150			printf(" class %s", class);
151	}
152	return (UNCONF);
153}
154
155static bus_space_tag_t
156central_alloc_bus_tag(struct central_softc *sc)
157{
158	struct sparc_bus_space_tag *bt;
159
160	bt = kmem_zalloc(sizeof(*bt), KM_SLEEP);
161	bt->cookie = sc;
162	bt->parent = sc->sc_bt;
163#if 0
164	bt->asi = bt->parent->asi;
165	bt->sasi = bt->parent->sasi;
166#endif
167	bt->sparc_bus_map = _central_bus_map;
168	/* XXX bt->sparc_bus_mmap = central_bus_mmap; */
169	/* XXX bt->sparc_intr_establish = upa_intr_establish; */
170	return (bt);
171}
172
173static int
174_central_bus_map(bus_space_tag_t t, bus_addr_t addr, bus_size_t size, int flags,
175	vaddr_t v, bus_space_handle_t *hp)
176{
177	struct central_softc *sc = t->cookie;
178	int64_t slot = BUS_ADDR_IOSPACE(addr);
179	int64_t offset = BUS_ADDR_PADDR(addr);
180	int i;
181
182	if (t->parent == NULL || t->parent->sparc_bus_map == NULL) {
183		printf("\ncentral_bus_map: invalid parent");
184		return (EINVAL);
185	}
186
187
188	for (i = 0; i < sc->sc_nrange; i++) {
189		bus_addr_t paddr;
190
191		if (sc->sc_range[i].cspace != slot)
192			continue;
193
194		paddr = offset - sc->sc_range[i].coffset;
195		paddr += sc->sc_range[i].poffset;
196		paddr |= ((bus_addr_t)sc->sc_range[i].pspace << 32);
197
198		return bus_space_map(t->parent, paddr, size, flags, hp);
199	}
200
201	return (EINVAL);
202}
203