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
46 struct exb_softc {
47 };
48
49 extern const struct exb_conf exb_confs[];
50
51 static int exb_match(device_t, cfdata_t, void *);
52 static void exb_attach(device_t, device_t, void *);
53 static int exb_print(void *, const char *);
54
55 CFATTACH_DECL_NEW(exb, sizeof(struct exb_softc), exb_match, exb_attach,
56 NULL, NULL);
57
58 static struct powerpc_bus_space exb_bus_space_tag =
59 { _BUS_SPACE_BIG_ENDIAN | _BUS_SPACE_MEM_TYPE, 0 };
60
61 static int
exb_match(device_t parent,cfdata_t cf,void * aux)62 exb_match(device_t parent, cfdata_t cf, void *aux)
63 {
64
65 return 1;
66 }
67
68 static void
exb_attach(device_t parent,device_t self,void * aux)69 exb_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
111 static int
exb_print(void * aux,const char * bus)112 exb_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
125 bus_space_tag_t
exb_get_bus_space_tag(void)126 exb_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