1 /* $NetBSD: obio.c,v 1.22 2021/08/07 16:18:49 thorpej Exp $ */
2
3 /*
4 * Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc.
5 * All rights reserved.
6 *
7 * Written by Jason R. Thorpe for Wasabi Systems, Inc.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed for the NetBSD Project by
20 * Wasabi Systems, Inc.
21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
22 * or promote products derived from this software without specific prior
23 * written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 /*
39 * On-board device autoconfiguration support for Intel IQ80310
40 * evaluation boards.
41 *
42 * The "obio" device node handles all of the CPLD functions,
43 * as well ... timer, interrupts, etc.
44 */
45
46 #include <sys/cdefs.h>
47 __KERNEL_RCSID(0, "$NetBSD: obio.c,v 1.22 2021/08/07 16:18:49 thorpej Exp $");
48
49 #include <sys/param.h>
50 #include <sys/systm.h>
51 #include <sys/device.h>
52
53 #include <machine/autoconf.h>
54 #include <sys/bus.h>
55
56 #include <evbarm/iq80310/iq80310reg.h>
57 #include <evbarm/iq80310/iq80310var.h>
58 #include <evbarm/iq80310/obiovar.h>
59
60 #include "locators.h"
61
62 int obio_match(device_t, cfdata_t, void *);
63 void obio_attach(device_t, device_t, void *);
64
65 CFATTACH_DECL_NEW(obio, 0,
66 obio_match, obio_attach, NULL, NULL);
67
68 int obio_print(void *, const char *);
69 int obio_search(device_t, cfdata_t, const int *, void *);
70
71 /* there can be only one */
72 bool obio_found;
73
74 int
obio_match(device_t parent,cfdata_t cf,void * aux)75 obio_match(device_t parent, cfdata_t cf, void *aux)
76 {
77 #if 0
78 struct mainbus_attach_args *ma = aux;
79 #endif
80
81 if (obio_found)
82 return (0);
83
84 #if 1
85 /* XXX Shoot arch/arm/mainbus in the head. */
86 return (1);
87 #else
88 if (strcmp(cf->cf_name, ma->ma_name) == 0)
89 return (1);
90
91 return (0);
92 #endif
93 }
94
95 void
obio_attach(device_t parent,device_t self,void * aux)96 obio_attach(device_t parent, device_t self, void *aux)
97 {
98
99 obio_found = true;
100
101 #if defined(IOP310_TEAMASA_NPWR)
102 /*
103 * These boards don't have revision/backplane detect registers.
104 * Just ignore it.
105 */
106 printf("\n");
107 #else /* Default to stock IQ80310 */
108 {
109 /*
110 * Yes, we're using knowledge of the obio bus space internals,
111 * here.
112 */
113 uint8_t board_rev = CPLD_READ(IQ80310_BOARD_REV);
114 uint8_t cpld_rev = CPLD_READ(IQ80310_CPLD_REV);
115 uint8_t backplane = CPLD_READ(IQ80310_BACKPLANE_DET);
116
117 printf(": board rev. %c, CPLD rev. %c, backplane %spresent\n",
118 BOARD_REV(board_rev), CPLD_REV(cpld_rev),
119 (backplane & 1) ? "" : "not ");
120 }
121 #endif /* list of IQ80310-based designs */
122
123 /*
124 * Attach all the on-board devices as described in the kernel
125 * configuration file.
126 */
127 config_search(self, NULL,
128 CFARGS(.search = obio_search));
129 }
130
131 int
obio_print(void * aux,const char * pnp)132 obio_print(void *aux, const char *pnp)
133 {
134 struct obio_attach_args *oba = aux;
135
136 aprint_normal(" addr 0x%08lx", oba->oba_addr);
137 if (oba->oba_size != OBIOCF_SIZE_DEFAULT)
138 aprint_normal("-0x%08lx", oba->oba_addr + (oba->oba_size - 1));
139 if (oba->oba_width != OBIOCF_WIDTH_DEFAULT)
140 aprint_normal(" width %d", oba->oba_width);
141 if (oba->oba_irq != -1)
142 aprint_normal(" xint3 %d", IRQ_XINT3(oba->oba_irq));
143
144 return (UNCONF);
145 }
146
147 int
obio_search(device_t parent,cfdata_t cf,const int * ldesc,void * aux)148 obio_search(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
149 {
150 struct obio_attach_args oba;
151
152 oba.oba_st = &obio_bs_tag;
153 oba.oba_addr = cf->cf_loc[OBIOCF_ADDR];
154 oba.oba_size = cf->cf_loc[OBIOCF_SIZE];
155 oba.oba_width = cf->cf_loc[OBIOCF_WIDTH];
156 if (cf->cf_loc[OBIOCF_XINT3] != OBIOCF_XINT3_DEFAULT)
157 oba.oba_irq = XINT3_IRQ(cf->cf_loc[OBIOCF_XINT3]);
158 else
159 oba.oba_irq = -1;
160
161 if (config_probe(parent, cf, &oba))
162 config_attach(parent, cf, &oba, obio_print, CFARGS_NONE);
163
164 return (0);
165 }
166