1/*	$Id: exb.c,v 1.5 2021/08/07 16:19:03 thorpej Exp $	*/
2
3/*-
4 * Copyright (c) 2010 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software developed for The NetBSD Foundation
8 * by Masao Uebayashi.
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: exb.c,v 1.5 2021/08/07 16:19:03 thorpej Exp $");
34
35#include "locators.h"
36
37#include <sys/param.h>
38#include <sys/systm.h>
39#include <sys/device.h>
40#include <sys/extent.h>
41#include <sys/bus.h>
42
43#include <powerpc/ibm4xx/dcr4xx.h>
44#include <powerpc/ibm4xx/dev/exbvar.h>
45
46struct exb_softc {
47};
48
49extern const struct exb_conf exb_confs[];
50
51static int exb_match(device_t, cfdata_t, void *);
52static void exb_attach(device_t, device_t, void *);
53static int exb_print(void *, const char *);
54
55CFATTACH_DECL_NEW(exb, sizeof(struct exb_softc), exb_match, exb_attach,
56    NULL, NULL);
57
58static struct powerpc_bus_space exb_bus_space_tag =
59    { _BUS_SPACE_BIG_ENDIAN | _BUS_SPACE_MEM_TYPE, 0 };
60
61static int
62exb_match(device_t parent, cfdata_t cf, void *aux)
63{
64
65	return 1;
66}
67
68static void
69exb_attach(device_t parent, device_t self, void *aux)
70{
71	const struct exb_conf *ec = exb_confs;
72	uint32_t ebc0_bNcr;
73	bus_addr_t base, size;
74	int locs[EXBCF_NLOCS];
75
76	printf("\n");
77
78	/* mtdcr needs a constant */
79	switch (device_unit(self)) {
80	case 0: mtdcr(DCR_EBC0_CFGADDR, DCR_EBC0_B0CR);	break;
81	case 1: mtdcr(DCR_EBC0_CFGADDR, DCR_EBC0_B1CR);	break;
82	case 2: mtdcr(DCR_EBC0_CFGADDR, DCR_EBC0_B2CR);	break;
83	case 3: mtdcr(DCR_EBC0_CFGADDR, DCR_EBC0_B3CR);	break;
84	case 4: mtdcr(DCR_EBC0_CFGADDR, DCR_EBC0_B4CR);	break;
85	case 5: mtdcr(DCR_EBC0_CFGADDR, DCR_EBC0_B5CR);	break;
86	case 6: mtdcr(DCR_EBC0_CFGADDR, DCR_EBC0_B6CR);	break;
87	case 7: mtdcr(DCR_EBC0_CFGADDR, DCR_EBC0_B7CR);	break;
88	}
89	ebc0_bNcr = mfdcr(DCR_EBC0_CFGDATA);
90	base = ebc0_bNcr & 0xfff00000;
91	size = 0x00100000 << ((ebc0_bNcr & 0x000e0000) >> 17);
92
93	exb_bus_space_tag.pbs_base = base;
94	exb_bus_space_tag.pbs_limit = base + size - 1;
95
96	while (ec->ec_name) {
97		struct exb_conf ec1;
98
99		locs[EXBCF_ADDR] = ec->ec_addr;
100
101		ec1 = *ec;
102		ec1.ec_bust = exb_get_bus_space_tag();
103
104		config_found(self, &ec1, exb_print,
105		    CFARGS(.submatch = config_stdsubmatch,
106			   .locators = locs));
107		ec++;
108	}
109}
110
111static int
112exb_print(void *aux, const char *bus)
113{
114	struct exb_conf *ec = aux;
115
116	if (bus)
117		return QUIET;
118
119	if (ec->ec_addr)
120		printf(" addr %"PRIxBUSADDR, ec->ec_addr);
121
122	return UNCONF;
123}
124
125bus_space_tag_t
126exb_get_bus_space_tag(void)
127{
128	static char ex_storage[EXTENT_FIXED_STORAGE_SIZE(8)]
129	    __attribute__((aligned(8)));
130	static int exb_bus_space_tag_inited;
131
132	if (exb_bus_space_tag_inited == 0) {
133		if (bus_space_init(&exb_bus_space_tag, "exbtag",
134		    ex_storage, sizeof(ex_storage)))
135			panic("exb_attach: Failed to initialise exb_bus_space_tag");
136		exb_bus_space_tag_inited = 1;
137	}
138	return &exb_bus_space_tag;
139}
140